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Finding the Fourth Proportional to 398,390.32, 549,773.64 and 217,110.16

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Solution

The fourth proportional to 398,390.32, 549,773.64 and 217,110.16 is: 299,609.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,390.32 : 549,773.64 = 217,110.16 : x
  2. Step 2: Convert to fraction form
    398,390.32/549,773.64 = 217,110.16/x
  3. Step 3: Cross multiply
    398,390.32x = 549,773.64 × 217,110.16
  4. Step 4: Simplify right side
    398,390.32x = 119,361,442,944.18
  5. Step 5: Solve for x
    x = 119,361,442,944.18/398,390.32
  6. Step 6: Final answer
    x = 299,609.30

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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.