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Finding the Fourth Proportional to 398,411.08, 549,793.38 and 217,119.34

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Solution

The fourth proportional to 398,411.08, 549,793.38 and 217,119.34 is: 299,617.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,411.08 : 549,793.38 = 217,119.34 : x
  2. Step 2: Convert to fraction form
    398,411.08/549,793.38 = 217,119.34/x
  3. Step 3: Cross multiply
    398,411.08x = 549,793.38 × 217,119.34
  4. Step 4: Simplify right side
    398,411.08x = 119,370,775,801.97
  5. Step 5: Solve for x
    x = 119,370,775,801.97/398,411.08
  6. Step 6: Final answer
    x = 299,617.11

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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.