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Finding the Fourth Proportional to 522,683.79, 783,932.18 and 138,435.28

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Solution

The fourth proportional to 522,683.79, 783,932.18 and 138,435.28 is: 207,628.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,683.79 : 783,932.18 = 138,435.28 : x
  2. Step 2: Convert to fraction form
    522,683.79/783,932.18 = 138,435.28/x
  3. Step 3: Cross multiply
    522,683.79x = 783,932.18 × 138,435.28
  4. Step 4: Simplify right side
    522,683.79x = 108,523,868,187.30
  5. Step 5: Solve for x
    x = 108,523,868,187.30/522,683.79
  6. Step 6: Final answer
    x = 207,628.15

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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.