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Finding the Fourth Proportional to 1,036.97, 1,431.02 and 571.22

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Solution

The fourth proportional to 1,036.97, 1,431.02 and 571.22 is: 788.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.97 : 1,431.02 = 571.22 : x
  2. Step 2: Convert to fraction form
    1,036.97/1,431.02 = 571.22/x
  3. Step 3: Cross multiply
    1,036.97x = 1,431.02 × 571.22
  4. Step 4: Simplify right side
    1,036.97x = 817,423.67
  5. Step 5: Solve for x
    x = 817,423.67/1,036.97
  6. Step 6: Final answer
    x = 788.28

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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.