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Finding the Fourth Proportional to 1,001.60, 1,382.21 and 559.50

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Solution

The fourth proportional to 1,001.60, 1,382.21 and 559.50 is: 772.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.60 : 1,382.21 = 559.50 : x
  2. Step 2: Convert to fraction form
    1,001.60/1,382.21 = 559.50/x
  3. Step 3: Cross multiply
    1,001.60x = 1,382.21 × 559.50
  4. Step 4: Simplify right side
    1,001.60x = 773,348.39
  5. Step 5: Solve for x
    x = 773,348.39/1,001.60
  6. Step 6: Final answer
    x = 772.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.