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Finding the Fourth Proportional to 398,399.77, 549,775.69 and 217,107.85

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Solution

The fourth proportional to 398,399.77, 549,775.69 and 217,107.85 is: 299,600.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,399.77 : 549,775.69 = 217,107.85 : x
  2. Step 2: Convert to fraction form
    398,399.77/549,775.69 = 217,107.85/x
  3. Step 3: Cross multiply
    398,399.77x = 549,775.69 × 217,107.85
  4. Step 4: Simplify right side
    398,399.77x = 119,360,614,203.75
  5. Step 5: Solve for x
    x = 119,360,614,203.75/398,399.77
  6. Step 6: Final answer
    x = 299,600.11

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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.