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Finding the Fourth Proportional to 1,612.55, 2,418.93 and 517.70

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Solution

The fourth proportional to 1,612.55, 2,418.93 and 517.70 is: 776.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,612.55 : 2,418.93 = 517.70 : x
  2. Step 2: Convert to fraction form
    1,612.55/2,418.93 = 517.70/x
  3. Step 3: Cross multiply
    1,612.55x = 2,418.93 × 517.70
  4. Step 4: Simplify right side
    1,612.55x = 1,252,280.06
  5. Step 5: Solve for x
    x = 1,252,280.06/1,612.55
  6. Step 6: Final answer
    x = 776.58

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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.