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Finding the Fourth Proportional to 1,715.86, 2,572.82 and 545.64

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Solution

The fourth proportional to 1,715.86, 2,572.82 and 545.64 is: 818.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,715.86 : 2,572.82 = 545.64 : x
  2. Step 2: Convert to fraction form
    1,715.86/2,572.82 = 545.64/x
  3. Step 3: Cross multiply
    1,715.86x = 2,572.82 × 545.64
  4. Step 4: Simplify right side
    1,715.86x = 1,403,833.50
  5. Step 5: Solve for x
    x = 1,403,833.50/1,715.86
  6. Step 6: Final answer
    x = 818.15

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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.