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Finding the Fourth Proportional to 720.02, 992.44 and 553.97

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Solution

The fourth proportional to 720.02, 992.44 and 553.97 is: 763.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.02 : 992.44 = 553.97 : x
  2. Step 2: Convert to fraction form
    720.02/992.44 = 553.97/x
  3. Step 3: Cross multiply
    720.02x = 992.44 × 553.97
  4. Step 4: Simplify right side
    720.02x = 549,781.99
  5. Step 5: Solve for x
    x = 549,781.99/720.02
  6. Step 6: Final answer
    x = 763.56

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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.