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Finding the Fourth Proportional to 261,432.60, 392,140.80 and 74,444.10

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Solution

The fourth proportional to 261,432.60, 392,140.80 and 74,444.10 is: 111,663.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,432.60 : 392,140.80 = 74,444.10 : x
  2. Step 2: Convert to fraction form
    261,432.60/392,140.80 = 74,444.10/x
  3. Step 3: Cross multiply
    261,432.60x = 392,140.80 × 74,444.10
  4. Step 4: Simplify right side
    261,432.60x = 29,192,568,929.28
  5. Step 5: Solve for x
    x = 29,192,568,929.28/261,432.60
  6. Step 6: Final answer
    x = 111,663.84

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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.