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Finding the Fourth Proportional to 1,613.47, 2,420.25 and 517.69

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Solution

The fourth proportional to 1,613.47, 2,420.25 and 517.69 is: 776.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,613.47 : 2,420.25 = 517.69 : x
  2. Step 2: Convert to fraction form
    1,613.47/2,420.25 = 517.69/x
  3. Step 3: Cross multiply
    1,613.47x = 2,420.25 × 517.69
  4. Step 4: Simplify right side
    1,613.47x = 1,252,924.53
  5. Step 5: Solve for x
    x = 1,252,924.53/1,613.47
  6. Step 6: Final answer
    x = 776.54

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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.