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Finding the Fourth Proportional to 638,642,405.80, 957,963,608.70 and 574,019,180.20

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Solution

The fourth proportional to 638,642,405.80, 957,963,608.70 and 574,019,180.20 is: 861,028,770.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,642,405.80 : 957,963,608.70 = 574,019,180.20 : x
  2. Step 2: Convert to fraction form
    638,642,405.80/957,963,608.70 = 574,019,180.20/x
  3. Step 3: Cross multiply
    638,642,405.80x = 957,963,608.70 × 574,019,180.20
  4. Step 4: Simplify right side
    638,642,405.80x = 549,889,485,327,407,680
  5. Step 5: Solve for x
    x = 549,889,485,327,407,680/638,642,405.80
  6. Step 6: Final answer
    x = 861,028,770.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.