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Finding the Fourth Proportional to 398,381.32, 549,761.22 and 217,101.16

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Solution

The fourth proportional to 398,381.32, 549,761.22 and 217,101.16 is: 299,596.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,381.32 : 549,761.22 = 217,101.16 : x
  2. Step 2: Convert to fraction form
    398,381.32/549,761.22 = 217,101.16/x
  3. Step 3: Cross multiply
    398,381.32x = 549,761.22 × 217,101.16
  4. Step 4: Simplify right side
    398,381.32x = 119,353,798,585.02
  5. Step 5: Solve for x
    x = 119,353,798,585.02/398,381.32
  6. Step 6: Final answer
    x = 299,596.88

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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.