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Finding the Fourth Proportional to 439,612.74, 658,233.46 and 287,432.40

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Solution

The fourth proportional to 439,612.74, 658,233.46 and 287,432.40 is: 430,373.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,612.74 : 658,233.46 = 287,432.40 : x
  2. Step 2: Convert to fraction form
    439,612.74/658,233.46 = 287,432.40/x
  3. Step 3: Cross multiply
    439,612.74x = 658,233.46 × 287,432.40
  4. Step 4: Simplify right side
    439,612.74x = 189,197,623,101.61
  5. Step 5: Solve for x
    x = 189,197,623,101.61/439,612.74
  6. Step 6: Final answer
    x = 430,373.38

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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.