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Finding the Fourth Proportional to 287,363.52, 428,513.76 and 267,418.08

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Solution

The fourth proportional to 287,363.52, 428,513.76 and 267,418.08 is: 398,771.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,363.52 : 428,513.76 = 267,418.08 : x
  2. Step 2: Convert to fraction form
    287,363.52/428,513.76 = 267,418.08/x
  3. Step 3: Cross multiply
    287,363.52x = 428,513.76 × 267,418.08
  4. Step 4: Simplify right side
    287,363.52x = 114,592,326,952.78
  5. Step 5: Solve for x
    x = 114,592,326,952.78/287,363.52
  6. Step 6: Final answer
    x = 398,771.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.