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Finding the Fourth Proportional to 398,390.04, 549,778.34 and 217,102.12

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Solution

The fourth proportional to 398,390.04, 549,778.34 and 217,102.12 is: 299,600.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,390.04 : 549,778.34 = 217,102.12 : x
  2. Step 2: Convert to fraction form
    398,390.04/549,778.34 = 217,102.12/x
  3. Step 3: Cross multiply
    398,390.04x = 549,778.34 × 217,102.12
  4. Step 4: Simplify right side
    398,390.04x = 119,358,043,144.08
  5. Step 5: Solve for x
    x = 119,358,043,144.08/398,390.04
  6. Step 6: Final answer
    x = 299,600.97

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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.