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Finding the Fourth Proportional to 1,036.58, 1,429.14 and 662.91

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Solution

The fourth proportional to 1,036.58, 1,429.14 and 662.91 is: 913.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.58 : 1,429.14 = 662.91 : x
  2. Step 2: Convert to fraction form
    1,036.58/1,429.14 = 662.91/x
  3. Step 3: Cross multiply
    1,036.58x = 1,429.14 × 662.91
  4. Step 4: Simplify right side
    1,036.58x = 947,391.20
  5. Step 5: Solve for x
    x = 947,391.20/1,036.58
  6. Step 6: Final answer
    x = 913.96

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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.