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Finding the Fourth Proportional to 924.88, 1,387.68 and 849.28

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Solution

The fourth proportional to 924.88, 1,387.68 and 849.28 is: 1,274.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.88 : 1,387.68 = 849.28 : x
  2. Step 2: Convert to fraction form
    924.88/1,387.68 = 849.28/x
  3. Step 3: Cross multiply
    924.88x = 1,387.68 × 849.28
  4. Step 4: Simplify right side
    924.88x = 1,178,528.87
  5. Step 5: Solve for x
    x = 1,178,528.87/924.88
  6. Step 6: Final answer
    x = 1,274.25

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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.