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Finding the Fourth Proportional to 515,074.73, 710,800.89 and 288,720.23

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Solution

The fourth proportional to 515,074.73, 710,800.89 and 288,720.23 is: 398,432.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,074.73 : 710,800.89 = 288,720.23 : x
  2. Step 2: Convert to fraction form
    515,074.73/710,800.89 = 288,720.23/x
  3. Step 3: Cross multiply
    515,074.73x = 710,800.89 × 288,720.23
  4. Step 4: Simplify right side
    515,074.73x = 205,222,596,445.01
  5. Step 5: Solve for x
    x = 205,222,596,445.01/515,074.73
  6. Step 6: Final answer
    x = 398,432.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.