Home / 398,621.55-550,090.34-217,335.05

Finding the Fourth Proportional to 398,621.55, 550,090.34 and 217,335.05

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Solution

The fourth proportional to 398,621.55, 550,090.34 and 217,335.05 is: 299,918.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,621.55 : 550,090.34 = 217,335.05 : x
  2. Step 2: Convert to fraction form
    398,621.55/550,090.34 = 217,335.05/x
  3. Step 3: Cross multiply
    398,621.55x = 550,090.34 × 217,335.05
  4. Step 4: Simplify right side
    398,621.55x = 119,553,910,589.14
  5. Step 5: Solve for x
    x = 119,553,910,589.14/398,621.55
  6. Step 6: Final answer
    x = 299,918.33

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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.