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Finding the Fourth Proportional to 1,616.58, 2,424.64 and 520.80

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Solution

The fourth proportional to 1,616.58, 2,424.64 and 520.80 is: 781.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,616.58 : 2,424.64 = 520.80 : x
  2. Step 2: Convert to fraction form
    1,616.58/2,424.64 = 520.80/x
  3. Step 3: Cross multiply
    1,616.58x = 2,424.64 × 520.80
  4. Step 4: Simplify right side
    1,616.58x = 1,262,752.51
  5. Step 5: Solve for x
    x = 1,262,752.51/1,616.58
  6. Step 6: Final answer
    x = 781.13

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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.