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Finding the Fourth Proportional to 439,892.60, 660,640.80 and 384,780.20

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Solution

The fourth proportional to 439,892.60, 660,640.80 and 384,780.20 is: 577,871.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,892.60 : 660,640.80 = 384,780.20 : x
  2. Step 2: Convert to fraction form
    439,892.60/660,640.80 = 384,780.20/x
  3. Step 3: Cross multiply
    439,892.60x = 660,640.80 × 384,780.20
  4. Step 4: Simplify right side
    439,892.60x = 254,201,499,152.16
  5. Step 5: Solve for x
    x = 254,201,499,152.16/439,892.60
  6. Step 6: Final answer
    x = 577,871.73

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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.