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Finding the Fourth Proportional to 1,590.47, 2,385.68 and 616.76

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Solution

The fourth proportional to 1,590.47, 2,385.68 and 616.76 is: 925.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.47 : 2,385.68 = 616.76 : x
  2. Step 2: Convert to fraction form
    1,590.47/2,385.68 = 616.76/x
  3. Step 3: Cross multiply
    1,590.47x = 2,385.68 × 616.76
  4. Step 4: Simplify right side
    1,590.47x = 1,471,376.98
  5. Step 5: Solve for x
    x = 1,471,376.98/1,590.47
  6. Step 6: Final answer
    x = 925.12

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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.