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Finding the Fourth Proportional to 924.31, 1,275.45 and 551.31

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Solution

The fourth proportional to 924.31, 1,275.45 and 551.31 is: 760.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.31 : 1,275.45 = 551.31 : x
  2. Step 2: Convert to fraction form
    924.31/1,275.45 = 551.31/x
  3. Step 3: Cross multiply
    924.31x = 1,275.45 × 551.31
  4. Step 4: Simplify right side
    924.31x = 703,161.49
  5. Step 5: Solve for x
    x = 703,161.49/924.31
  6. Step 6: Final answer
    x = 760.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.