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Finding the Fourth Proportional to 923.52, 1,274.07 and 661.89

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Solution

The fourth proportional to 923.52, 1,274.07 and 661.89 is: 913.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.52 : 1,274.07 = 661.89 : x
  2. Step 2: Convert to fraction form
    923.52/1,274.07 = 661.89/x
  3. Step 3: Cross multiply
    923.52x = 1,274.07 × 661.89
  4. Step 4: Simplify right side
    923.52x = 843,294.19
  5. Step 5: Solve for x
    x = 843,294.19/923.52
  6. Step 6: Final answer
    x = 913.13

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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.