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Finding the Fourth Proportional to 410,308.58, 615,401.30 and 129,789.38

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Solution

The fourth proportional to 410,308.58, 615,401.30 and 129,789.38 is: 194,664.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,308.58 : 615,401.30 = 129,789.38 : x
  2. Step 2: Convert to fraction form
    410,308.58/615,401.30 = 129,789.38/x
  3. Step 3: Cross multiply
    410,308.58x = 615,401.30 × 129,789.38
  4. Step 4: Simplify right side
    410,308.58x = 79,872,549,452.24
  5. Step 5: Solve for x
    x = 79,872,549,452.24/410,308.58
  6. Step 6: Final answer
    x = 194,664.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.