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Finding the Fourth Proportional to 1,001.04, 1,382.09 and 647.12

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Solution

The fourth proportional to 1,001.04, 1,382.09 and 647.12 is: 893.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.04 : 1,382.09 = 647.12 : x
  2. Step 2: Convert to fraction form
    1,001.04/1,382.09 = 647.12/x
  3. Step 3: Cross multiply
    1,001.04x = 1,382.09 × 647.12
  4. Step 4: Simplify right side
    1,001.04x = 894,367.93
  5. Step 5: Solve for x
    x = 894,367.93/1,001.04
  6. Step 6: Final answer
    x = 893.44

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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.