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Finding the Fourth Proportional to 720,059.74, 993,685.95 and 393,377.29

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Solution

The fourth proportional to 720,059.74, 993,685.95 and 393,377.29 is: 542,862.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,059.74 : 993,685.95 = 393,377.29 : x
  2. Step 2: Convert to fraction form
    720,059.74/993,685.95 = 393,377.29/x
  3. Step 3: Cross multiply
    720,059.74x = 993,685.95 × 393,377.29
  4. Step 4: Simplify right side
    720,059.74x = 390,893,486,122.08
  5. Step 5: Solve for x
    x = 390,893,486,122.08/720,059.74
  6. Step 6: Final answer
    x = 542,862.58

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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.