Home / 398,391.12-549,765.77-217,099.35

Finding the Fourth Proportional to 398,391.12, 549,765.77 and 217,099.35

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Solution

The fourth proportional to 398,391.12, 549,765.77 and 217,099.35 is: 299,589.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,391.12 : 549,765.77 = 217,099.35 : x
  2. Step 2: Convert to fraction form
    398,391.12/549,765.77 = 217,099.35/x
  3. Step 3: Cross multiply
    398,391.12x = 549,765.77 × 217,099.35
  4. Step 4: Simplify right side
    398,391.12x = 119,353,790,233.75
  5. Step 5: Solve for x
    x = 119,353,790,233.75/398,391.12
  6. Step 6: Final answer
    x = 299,589.48

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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.