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Finding the Fourth Proportional to 415,426.60, 623,139.90 and 134,972.20

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Solution

The fourth proportional to 415,426.60, 623,139.90 and 134,972.20 is: 202,458.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,426.60 : 623,139.90 = 134,972.20 : x
  2. Step 2: Convert to fraction form
    415,426.60/623,139.90 = 134,972.20/x
  3. Step 3: Cross multiply
    415,426.60x = 623,139.90 × 134,972.20
  4. Step 4: Simplify right side
    415,426.60x = 84,106,563,210.78
  5. Step 5: Solve for x
    x = 84,106,563,210.78/415,426.60
  6. Step 6: Final answer
    x = 202,458.30

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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.