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Finding the Fourth Proportional to 720.32, 993.60 and 545.60

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Solution

The fourth proportional to 720.32, 993.60 and 545.60 is: 752.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.32 : 993.60 = 545.60 : x
  2. Step 2: Convert to fraction form
    720.32/993.60 = 545.60/x
  3. Step 3: Cross multiply
    720.32x = 993.60 × 545.60
  4. Step 4: Simplify right side
    720.32x = 542,108.16
  5. Step 5: Solve for x
    x = 542,108.16/720.32
  6. Step 6: Final answer
    x = 752.59

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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.