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Finding the Fourth Proportional to 627,221.30, 865,639.59 and 372,573.50

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Solution

The fourth proportional to 627,221.30, 865,639.59 and 372,573.50 is: 514,195.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,221.30 : 865,639.59 = 372,573.50 : x
  2. Step 2: Convert to fraction form
    627,221.30/865,639.59 = 372,573.50/x
  3. Step 3: Cross multiply
    627,221.30x = 865,639.59 × 372,573.50
  4. Step 4: Simplify right side
    627,221.30x = 322,514,371,784.87
  5. Step 5: Solve for x
    x = 322,514,371,784.87/627,221.30
  6. Step 6: Final answer
    x = 514,195.50

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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.