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Finding the Fourth Proportional to 1,001.00, 1,381.31 and 558.88

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Solution

The fourth proportional to 1,001.00, 1,381.31 and 558.88 is: 771.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.00 : 1,381.31 = 558.88 : x
  2. Step 2: Convert to fraction form
    1,001.00/1,381.31 = 558.88/x
  3. Step 3: Cross multiply
    1,001.00x = 1,381.31 × 558.88
  4. Step 4: Simplify right side
    1,001.00x = 771,980.29
  5. Step 5: Solve for x
    x = 771,980.29/1,001.00
  6. Step 6: Final answer
    x = 771.21

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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.