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Finding the Fourth Proportional to 580,120.80, 872,125.20 and 503,138.40

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Solution

The fourth proportional to 580,120.80, 872,125.20 and 503,138.40 is: 756,393.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,120.80 : 872,125.20 = 503,138.40 : x
  2. Step 2: Convert to fraction form
    580,120.80/872,125.20 = 503,138.40/x
  3. Step 3: Cross multiply
    580,120.80x = 872,125.20 × 503,138.40
  4. Step 4: Simplify right side
    580,120.80x = 438,799,677,727.68
  5. Step 5: Solve for x
    x = 438,799,677,727.68/580,120.80
  6. Step 6: Final answer
    x = 756,393.63

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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.