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Finding the Fourth Proportional to 1,007.29, 1,510.34 and 747.95

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Solution

The fourth proportional to 1,007.29, 1,510.34 and 747.95 is: 1,121.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007.29 : 1,510.34 = 747.95 : x
  2. Step 2: Convert to fraction form
    1,007.29/1,510.34 = 747.95/x
  3. Step 3: Cross multiply
    1,007.29x = 1,510.34 × 747.95
  4. Step 4: Simplify right side
    1,007.29x = 1,129,653.12
  5. Step 5: Solve for x
    x = 1,129,653.12/1,007.29
  6. Step 6: Final answer
    x = 1,121.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.