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Finding the Fourth Proportional to 287,369.88, 430,854.78 and 127,359

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Solution

The fourth proportional to 287,369.88, 430,854.78 and 127,359 is: 190,949.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,369.88 : 430,854.78 = 127,359 : x
  2. Step 2: Convert to fraction form
    287,369.88/430,854.78 = 127,359/x
  3. Step 3: Cross multiply
    287,369.88x = 430,854.78 × 127,359
  4. Step 4: Simplify right side
    287,369.88x = 54,873,233,926.02
  5. Step 5: Solve for x
    x = 54,873,233,926.02/287,369.88
  6. Step 6: Final answer
    x = 190,949.84

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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.