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Finding the Fourth Proportional to 720,627.32, 994,465.38 and 398,337.56

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Solution

The fourth proportional to 720,627.32, 994,465.38 and 398,337.56 is: 549,705.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,627.32 : 994,465.38 = 398,337.56 : x
  2. Step 2: Convert to fraction form
    720,627.32/994,465.38 = 398,337.56/x
  3. Step 3: Cross multiply
    720,627.32x = 994,465.38 × 398,337.56
  4. Step 4: Simplify right side
    720,627.32x = 396,132,912,973.67
  5. Step 5: Solve for x
    x = 396,132,912,973.67/720,627.32
  6. Step 6: Final answer
    x = 549,705.66

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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.