Home / 810,003.20-1,215,004.80-542,314.40

Finding the Fourth Proportional to 810,003.20, 1,215,004.80 and 542,314.40

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Solution

The fourth proportional to 810,003.20, 1,215,004.80 and 542,314.40 is: 813,471.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,003.20 : 1,215,004.80 = 542,314.40 : x
  2. Step 2: Convert to fraction form
    810,003.20/1,215,004.80 = 542,314.40/x
  3. Step 3: Cross multiply
    810,003.20x = 1,215,004.80 × 542,314.40
  4. Step 4: Simplify right side
    810,003.20x = 658,914,599,109.12
  5. Step 5: Solve for x
    x = 658,914,599,109.12/810,003.20
  6. Step 6: Final answer
    x = 813,471.60

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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.