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Finding the Fourth Proportional to 927,706.80, 1,388,449.80 and 815,732.40

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Solution

The fourth proportional to 927,706.80, 1,388,449.80 and 815,732.40 is: 1,220,863.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    927,706.80 : 1,388,449.80 = 815,732.40 : x
  2. Step 2: Convert to fraction form
    927,706.80/1,388,449.80 = 815,732.40/x
  3. Step 3: Cross multiply
    927,706.80x = 1,388,449.80 × 815,732.40
  4. Step 4: Simplify right side
    927,706.80x = 1,132,603,487,633.52
  5. Step 5: Solve for x
    x = 1,132,603,487,633.52/927,706.80
  6. Step 6: Final answer
    x = 1,220,863.63

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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.