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Finding the Fourth Proportional to 627,138.56, 865,448.96 and 358,865.92

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Solution

The fourth proportional to 627,138.56, 865,448.96 and 358,865.92 is: 495,233.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,138.56 : 865,448.96 = 358,865.92 : x
  2. Step 2: Convert to fraction form
    627,138.56/865,448.96 = 358,865.92/x
  3. Step 3: Cross multiply
    627,138.56x = 865,448.96 × 358,865.92
  4. Step 4: Simplify right side
    627,138.56x = 310,580,137,243.44
  5. Step 5: Solve for x
    x = 310,580,137,243.44/627,138.56
  6. Step 6: Final answer
    x = 495,233.68

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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.