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Finding the Fourth Proportional to 261,691.20, 392,666.40 and 149,457.60

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Solution

The fourth proportional to 261,691.20, 392,666.40 and 149,457.60 is: 224,260.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,691.20 : 392,666.40 = 149,457.60 : x
  2. Step 2: Convert to fraction form
    261,691.20/392,666.40 = 149,457.60/x
  3. Step 3: Cross multiply
    261,691.20x = 392,666.40 × 149,457.60
  4. Step 4: Simplify right side
    261,691.20x = 58,686,977,744.64
  5. Step 5: Solve for x
    x = 58,686,977,744.64/261,691.20
  6. Step 6: Final answer
    x = 224,260.42

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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.