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Finding the Fourth Proportional to 1,616.40, 2,424.96 and 520.82

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Solution

The fourth proportional to 1,616.40, 2,424.96 and 520.82 is: 781.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,616.40 : 2,424.96 = 520.82 : x
  2. Step 2: Convert to fraction form
    1,616.40/2,424.96 = 520.82/x
  3. Step 3: Cross multiply
    1,616.40x = 2,424.96 × 520.82
  4. Step 4: Simplify right side
    1,616.40x = 1,262,967.67
  5. Step 5: Solve for x
    x = 1,262,967.67/1,616.40
  6. Step 6: Final answer
    x = 781.35

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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.