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Finding the Fourth Proportional to 720,785.95, 994,705.37 and 398,516.85

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Solution

The fourth proportional to 720,785.95, 994,705.37 and 398,516.85 is: 549,964.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,785.95 : 994,705.37 = 398,516.85 : x
  2. Step 2: Convert to fraction form
    720,785.95/994,705.37 = 398,516.85/x
  3. Step 3: Cross multiply
    720,785.95x = 994,705.37 × 398,516.85
  4. Step 4: Simplify right side
    720,785.95x = 396,406,843,764.37
  5. Step 5: Solve for x
    x = 396,406,843,764.37/720,785.95
  6. Step 6: Final answer
    x = 549,964.72

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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.