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Finding the Fourth Proportional to 720.20, 992.50 and 554.92

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Solution

The fourth proportional to 720.20, 992.50 and 554.92 is: 764.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.20 : 992.50 = 554.92 : x
  2. Step 2: Convert to fraction form
    720.20/992.50 = 554.92/x
  3. Step 3: Cross multiply
    720.20x = 992.50 × 554.92
  4. Step 4: Simplify right side
    720.20x = 550,758.10
  5. Step 5: Solve for x
    x = 550,758.10/720.20
  6. Step 6: Final answer
    x = 764.73

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1.5x scale

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.