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Finding the Fourth Proportional to 398,311.60, 549,663.08 and 217,025.04

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Solution

The fourth proportional to 398,311.60, 549,663.08 and 217,025.04 is: 299,490.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,311.60 : 549,663.08 = 217,025.04 : x
  2. Step 2: Convert to fraction form
    398,311.60/549,663.08 = 217,025.04/x
  3. Step 3: Cross multiply
    398,311.60x = 549,663.08 × 217,025.04
  4. Step 4: Simplify right side
    398,311.60x = 119,290,651,923.52
  5. Step 5: Solve for x
    x = 119,290,651,923.52/398,311.60
  6. Step 6: Final answer
    x = 299,490.78

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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.