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Finding the Fourth Proportional to 924.72, 1,274.87 and 629.47

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Solution

The fourth proportional to 924.72, 1,274.87 and 629.47 is: 867.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.72 : 1,274.87 = 629.47 : x
  2. Step 2: Convert to fraction form
    924.72/1,274.87 = 629.47/x
  3. Step 3: Cross multiply
    924.72x = 1,274.87 × 629.47
  4. Step 4: Simplify right side
    924.72x = 802,492.42
  5. Step 5: Solve for x
    x = 802,492.42/924.72
  6. Step 6: Final answer
    x = 867.82

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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.