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Finding the Fourth Proportional to 924.61, 1,386.89 and 275.29

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Solution

The fourth proportional to 924.61, 1,386.89 and 275.29 is: 412.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.61 : 1,386.89 = 275.29 : x
  2. Step 2: Convert to fraction form
    924.61/1,386.89 = 275.29/x
  3. Step 3: Cross multiply
    924.61x = 1,386.89 × 275.29
  4. Step 4: Simplify right side
    924.61x = 381,796.95
  5. Step 5: Solve for x
    x = 381,796.95/924.61
  6. Step 6: Final answer
    x = 412.93

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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.