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Finding the Fourth Proportional to 1,330.31, 1,835.76 and 732.78

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Solution

The fourth proportional to 1,330.31, 1,835.76 and 732.78 is: 1,011.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.31 : 1,835.76 = 732.78 : x
  2. Step 2: Convert to fraction form
    1,330.31/1,835.76 = 732.78/x
  3. Step 3: Cross multiply
    1,330.31x = 1,835.76 × 732.78
  4. Step 4: Simplify right side
    1,330.31x = 1,345,208.21
  5. Step 5: Solve for x
    x = 1,345,208.21/1,330.31
  6. Step 6: Final answer
    x = 1,011.20

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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.