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Finding the Fourth Proportional to 938.54, 1,295.12 and 545.69

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Solution

The fourth proportional to 938.54, 1,295.12 and 545.69 is: 753.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.54 : 1,295.12 = 545.69 : x
  2. Step 2: Convert to fraction form
    938.54/1,295.12 = 545.69/x
  3. Step 3: Cross multiply
    938.54x = 1,295.12 × 545.69
  4. Step 4: Simplify right side
    938.54x = 706,724.83
  5. Step 5: Solve for x
    x = 706,724.83/938.54
  6. Step 6: Final answer
    x = 753.01

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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.