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Finding the Fourth Proportional to 439,734.60, 659,601.90 and 387,203.40

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Solution

The fourth proportional to 439,734.60, 659,601.90 and 387,203.40 is: 580,805.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,734.60 : 659,601.90 = 387,203.40 : x
  2. Step 2: Convert to fraction form
    439,734.60/659,601.90 = 387,203.40/x
  3. Step 3: Cross multiply
    439,734.60x = 659,601.90 × 387,203.40
  4. Step 4: Simplify right side
    439,734.60x = 255,400,098,326.46
  5. Step 5: Solve for x
    x = 255,400,098,326.46/439,734.60
  6. Step 6: Final answer
    x = 580,805.10

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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.