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Finding the Fourth Proportional to 720,132.72, 993,803.22 and 397,863.60

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Solution

The fourth proportional to 720,132.72, 993,803.22 and 397,863.60 is: 549,062.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,132.72 : 993,803.22 = 397,863.60 : x
  2. Step 2: Convert to fraction form
    720,132.72/993,803.22 = 397,863.60/x
  3. Step 3: Cross multiply
    720,132.72x = 993,803.22 × 397,863.60
  4. Step 4: Simplify right side
    720,132.72x = 395,398,126,800.79
  5. Step 5: Solve for x
    x = 395,398,126,800.79/720,132.72
  6. Step 6: Final answer
    x = 549,062.85

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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.