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Finding the Fourth Proportional to 391,964.60, 587,801.10 and 155,258.30

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Solution

The fourth proportional to 391,964.60, 587,801.10 and 155,258.30 is: 232,829.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,964.60 : 587,801.10 = 155,258.30 : x
  2. Step 2: Convert to fraction form
    391,964.60/587,801.10 = 155,258.30/x
  3. Step 3: Cross multiply
    391,964.60x = 587,801.10 × 155,258.30
  4. Step 4: Simplify right side
    391,964.60x = 91,260,999,524.13
  5. Step 5: Solve for x
    x = 91,260,999,524.13/391,964.60
  6. Step 6: Final answer
    x = 232,829.70

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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.