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Finding the Fourth Proportional to 391,492.20, 587,238.30 and 170,308.20

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Solution

The fourth proportional to 391,492.20, 587,238.30 and 170,308.20 is: 255,462.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,492.20 : 587,238.30 = 170,308.20 : x
  2. Step 2: Convert to fraction form
    391,492.20/587,238.30 = 170,308.20/x
  3. Step 3: Cross multiply
    391,492.20x = 587,238.30 × 170,308.20
  4. Step 4: Simplify right side
    391,492.20x = 100,011,497,844.06
  5. Step 5: Solve for x
    x = 100,011,497,844.06/391,492.20
  6. Step 6: Final answer
    x = 255,462.30

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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.