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Finding the Fourth Proportional to 1,001.40, 1,382.01 and 581.79

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Solution

The fourth proportional to 1,001.40, 1,382.01 and 581.79 is: 802.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.40 : 1,382.01 = 581.79 : x
  2. Step 2: Convert to fraction form
    1,001.40/1,382.01 = 581.79/x
  3. Step 3: Cross multiply
    1,001.40x = 1,382.01 × 581.79
  4. Step 4: Simplify right side
    1,001.40x = 804,039.60
  5. Step 5: Solve for x
    x = 804,039.60/1,001.40
  6. Step 6: Final answer
    x = 802.92

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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.