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Finding the Fourth Proportional to 726.19, 1,001.83 and 431.40

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Solution

The fourth proportional to 726.19, 1,001.83 and 431.40 is: 595.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.19 : 1,001.83 = 431.40 : x
  2. Step 2: Convert to fraction form
    726.19/1,001.83 = 431.40/x
  3. Step 3: Cross multiply
    726.19x = 1,001.83 × 431.40
  4. Step 4: Simplify right side
    726.19x = 432,184.63
  5. Step 5: Solve for x
    x = 432,184.63/726.19
  6. Step 6: Final answer
    x = 595.14

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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.