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Finding the Fourth Proportional to 617.45, 847.55 and 545.95

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Solution

The fourth proportional to 617.45, 847.55 and 545.95 is: 749.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.45 : 847.55 = 545.95 : x
  2. Step 2: Convert to fraction form
    617.45/847.55 = 545.95/x
  3. Step 3: Cross multiply
    617.45x = 847.55 × 545.95
  4. Step 4: Simplify right side
    617.45x = 462,714.32
  5. Step 5: Solve for x
    x = 462,714.32/617.45
  6. Step 6: Final answer
    x = 749.39

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.