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Finding the Fourth Proportional to 762.05, 1,135.07 and 726.50

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Solution

The fourth proportional to 762.05, 1,135.07 and 726.50 is: 1,082.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.05 : 1,135.07 = 726.50 : x
  2. Step 2: Convert to fraction form
    762.05/1,135.07 = 726.50/x
  3. Step 3: Cross multiply
    762.05x = 1,135.07 × 726.50
  4. Step 4: Simplify right side
    762.05x = 824,628.36
  5. Step 5: Solve for x
    x = 824,628.36/762.05
  6. Step 6: Final answer
    x = 1,082.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.