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Finding the Fourth Proportional to 542,419.80, 813,629.70 and 187,315.80

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Solution

The fourth proportional to 542,419.80, 813,629.70 and 187,315.80 is: 280,973.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,419.80 : 813,629.70 = 187,315.80 : x
  2. Step 2: Convert to fraction form
    542,419.80/813,629.70 = 187,315.80/x
  3. Step 3: Cross multiply
    542,419.80x = 813,629.70 × 187,315.80
  4. Step 4: Simplify right side
    542,419.80x = 152,405,698,159.26
  5. Step 5: Solve for x
    x = 152,405,698,159.26/542,419.80
  6. Step 6: Final answer
    x = 280,973.70

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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.