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Finding the Fourth Proportional to 373,358.10, 515,203.56 and 212,176.20

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Solution

The fourth proportional to 373,358.10, 515,203.56 and 212,176.20 is: 292,785.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,358.10 : 515,203.56 = 212,176.20 : x
  2. Step 2: Convert to fraction form
    373,358.10/515,203.56 = 212,176.20/x
  3. Step 3: Cross multiply
    373,358.10x = 515,203.56 × 212,176.20
  4. Step 4: Simplify right side
    373,358.10x = 109,313,933,587.27
  5. Step 5: Solve for x
    x = 109,313,933,587.27/373,358.10
  6. Step 6: Final answer
    x = 292,785.76

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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.