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Finding the Fourth Proportional to 722.04, 1,081.44 and 397.20

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Solution

The fourth proportional to 722.04, 1,081.44 and 397.20 is: 594.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.04 : 1,081.44 = 397.20 : x
  2. Step 2: Convert to fraction form
    722.04/1,081.44 = 397.20/x
  3. Step 3: Cross multiply
    722.04x = 1,081.44 × 397.20
  4. Step 4: Simplify right side
    722.04x = 429,547.97
  5. Step 5: Solve for x
    x = 429,547.97/722.04
  6. Step 6: Final answer
    x = 594.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.