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Finding the Fourth Proportional to 288,386, 432,579 and 91,394

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Solution

The fourth proportional to 288,386, 432,579 and 91,394 is: 137,091

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,386 : 432,579 = 91,394 : x
  2. Step 2: Convert to fraction form
    288,386/432,579 = 91,394/x
  3. Step 3: Cross multiply
    288,386x = 432,579 × 91,394
  4. Step 4: Simplify right side
    288,386x = 39,535,125,126
  5. Step 5: Solve for x
    x = 39,535,125,126/288,386
  6. Step 6: Final answer
    x = 137,091

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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.