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Finding the Fourth Proportional to 938.86, 1,295.71 and 545.91

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Solution

The fourth proportional to 938.86, 1,295.71 and 545.91 is: 753.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.86 : 1,295.71 = 545.91 : x
  2. Step 2: Convert to fraction form
    938.86/1,295.71 = 545.91/x
  3. Step 3: Cross multiply
    938.86x = 1,295.71 × 545.91
  4. Step 4: Simplify right side
    938.86x = 707,339.68
  5. Step 5: Solve for x
    x = 707,339.68/938.86
  6. Step 6: Final answer
    x = 753.40

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1.5x scale

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.