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Finding the Fourth Proportional to 398,132.79, 549,435.87 and 216,850.20

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Solution

The fourth proportional to 398,132.79, 549,435.87 and 216,850.20 is: 299,260.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,132.79 : 549,435.87 = 216,850.20 : x
  2. Step 2: Convert to fraction form
    398,132.79/549,435.87 = 216,850.20/x
  3. Step 3: Cross multiply
    398,132.79x = 549,435.87 × 216,850.20
  4. Step 4: Simplify right side
    398,132.79x = 119,145,278,296.67
  5. Step 5: Solve for x
    x = 119,145,278,296.67/398,132.79
  6. Step 6: Final answer
    x = 299,260.15

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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.