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Finding the Fourth Proportional to 287,862.88, 431,690.58 and 121,663.84

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Solution

The fourth proportional to 287,862.88, 431,690.58 and 121,663.84 is: 182,451.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,862.88 : 431,690.58 = 121,663.84 : x
  2. Step 2: Convert to fraction form
    287,862.88/431,690.58 = 121,663.84/x
  3. Step 3: Cross multiply
    287,862.88x = 431,690.58 × 121,663.84
  4. Step 4: Simplify right side
    287,862.88x = 52,521,133,654.63
  5. Step 5: Solve for x
    x = 52,521,133,654.63/287,862.88
  6. Step 6: Final answer
    x = 182,451.91

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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.