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Finding the Fourth Proportional to 1,225.54, 1,691.29 and 673.54

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Solution

The fourth proportional to 1,225.54, 1,691.29 and 673.54 is: 929.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.54 : 1,691.29 = 673.54 : x
  2. Step 2: Convert to fraction form
    1,225.54/1,691.29 = 673.54/x
  3. Step 3: Cross multiply
    1,225.54x = 1,691.29 × 673.54
  4. Step 4: Simplify right side
    1,225.54x = 1,139,151.47
  5. Step 5: Solve for x
    x = 1,139,151.47/1,225.54
  6. Step 6: Final answer
    x = 929.51

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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.