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Finding the Fourth Proportional to 487,460.90, 731,623.35 and 287,531.30

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Solution

The fourth proportional to 487,460.90, 731,623.35 and 287,531.30 is: 431,551.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,460.90 : 731,623.35 = 287,531.30 : x
  2. Step 2: Convert to fraction form
    487,460.90/731,623.35 = 287,531.30/x
  3. Step 3: Cross multiply
    487,460.90x = 731,623.35 × 287,531.30
  4. Step 4: Simplify right side
    487,460.90x = 210,364,612,935.86
  5. Step 5: Solve for x
    x = 210,364,612,935.86/487,460.90
  6. Step 6: Final answer
    x = 431,551.77

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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.