Home / 720,200,378.66-993,877,531.05-390,175,517.66

Finding the Fourth Proportional to 720,200,378.66, 993,877,531.05 and 390,175,517.66

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Solution

The fourth proportional to 720,200,378.66, 993,877,531.05 and 390,175,517.66 is: 538,442,760.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,200,378.66 : 993,877,531.05 = 390,175,517.66 : x
  2. Step 2: Convert to fraction form
    720,200,378.66/993,877,531.05 = 390,175,517.66/x
  3. Step 3: Cross multiply
    720,200,378.66x = 993,877,531.05 × 390,175,517.66
  4. Step 4: Simplify right side
    720,200,378.66x = 387,786,680,163,107,008
  5. Step 5: Solve for x
    x = 387,786,680,163,107,008/720,200,378.66
  6. Step 6: Final answer
    x = 538,442,760.73

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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.