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Finding the Fourth Proportional to 987,963.76, 1,363,396.62 and 535,254.76

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Solution

The fourth proportional to 987,963.76, 1,363,396.62 and 535,254.76 is: 738,655.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,963.76 : 1,363,396.62 = 535,254.76 : x
  2. Step 2: Convert to fraction form
    987,963.76/1,363,396.62 = 535,254.76/x
  3. Step 3: Cross multiply
    987,963.76x = 1,363,396.62 × 535,254.76
  4. Step 4: Simplify right side
    987,963.76x = 729,764,530,622.91
  5. Step 5: Solve for x
    x = 729,764,530,622.91/987,963.76
  6. Step 6: Final answer
    x = 738,655.16

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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.