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Finding the Fourth Proportional to 398,417.22, 549,799.72 and 217,125.26

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Solution

The fourth proportional to 398,417.22, 549,799.72 and 217,125.26 is: 299,624.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,417.22 : 549,799.72 = 217,125.26 : x
  2. Step 2: Convert to fraction form
    398,417.22/549,799.72 = 217,125.26/x
  3. Step 3: Cross multiply
    398,417.22x = 549,799.72 × 217,125.26
  4. Step 4: Simplify right side
    398,417.22x = 119,375,405,922.86
  5. Step 5: Solve for x
    x = 119,375,405,922.86/398,417.22
  6. Step 6: Final answer
    x = 299,624.11

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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.