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Finding the Fourth Proportional to 923.61, 1,274.35 and 564.61

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Solution

The fourth proportional to 923.61, 1,274.35 and 564.61 is: 779.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.61 : 1,274.35 = 564.61 : x
  2. Step 2: Convert to fraction form
    923.61/1,274.35 = 564.61/x
  3. Step 3: Cross multiply
    923.61x = 1,274.35 × 564.61
  4. Step 4: Simplify right side
    923.61x = 719,502.97
  5. Step 5: Solve for x
    x = 719,502.97/923.61
  6. Step 6: Final answer
    x = 779.02

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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.