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Finding the Fourth Proportional to 924.08, 1,385.85 and 761.36

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Solution

The fourth proportional to 924.08, 1,385.85 and 761.36 is: 1,141.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.08 : 1,385.85 = 761.36 : x
  2. Step 2: Convert to fraction form
    924.08/1,385.85 = 761.36/x
  3. Step 3: Cross multiply
    924.08x = 1,385.85 × 761.36
  4. Step 4: Simplify right side
    924.08x = 1,055,130.76
  5. Step 5: Solve for x
    x = 1,055,130.76/924.08
  6. Step 6: Final answer
    x = 1,141.82

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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.