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Finding the Fourth Proportional to 1,612.36, 2,418.95 and 516.70

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Solution

The fourth proportional to 1,612.36, 2,418.95 and 516.70 is: 775.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,612.36 : 2,418.95 = 516.70 : x
  2. Step 2: Convert to fraction form
    1,612.36/2,418.95 = 516.70/x
  3. Step 3: Cross multiply
    1,612.36x = 2,418.95 × 516.70
  4. Step 4: Simplify right side
    1,612.36x = 1,249,871.47
  5. Step 5: Solve for x
    x = 1,249,871.47/1,612.36
  6. Step 6: Final answer
    x = 775.18

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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.