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Finding the Fourth Proportional to 1,013.30, 1,398.29 and 571.22

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Solution

The fourth proportional to 1,013.30, 1,398.29 and 571.22 is: 788.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.30 : 1,398.29 = 571.22 : x
  2. Step 2: Convert to fraction form
    1,013.30/1,398.29 = 571.22/x
  3. Step 3: Cross multiply
    1,013.30x = 1,398.29 × 571.22
  4. Step 4: Simplify right side
    1,013.30x = 798,731.21
  5. Step 5: Solve for x
    x = 798,731.21/1,013.30
  6. Step 6: Final answer
    x = 788.25

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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.