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Finding the Fourth Proportional to 807.71, 1,113.75 and 545.27

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Solution

The fourth proportional to 807.71, 1,113.75 and 545.27 is: 751.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.71 : 1,113.75 = 545.27 : x
  2. Step 2: Convert to fraction form
    807.71/1,113.75 = 545.27/x
  3. Step 3: Cross multiply
    807.71x = 1,113.75 × 545.27
  4. Step 4: Simplify right side
    807.71x = 607,288.89
  5. Step 5: Solve for x
    x = 607,288.89/807.71
  6. Step 6: Final answer
    x = 751.87

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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.