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Finding the Fourth Proportional to 720,598.91, 994,465.22 and 398,338.92

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Solution

The fourth proportional to 720,598.91, 994,465.22 and 398,338.92 is: 549,729.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,598.91 : 994,465.22 = 398,338.92 : x
  2. Step 2: Convert to fraction form
    720,598.91/994,465.22 = 398,338.92/x
  3. Step 3: Cross multiply
    720,598.91x = 994,465.22 × 398,338.92
  4. Step 4: Simplify right side
    720,598.91x = 396,134,199,720.67
  5. Step 5: Solve for x
    x = 396,134,199,720.67/720,598.91
  6. Step 6: Final answer
    x = 549,729.12

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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.