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Finding the Fourth Proportional to 260,999.70, 391,499.55 and 210,261.30

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Solution

The fourth proportional to 260,999.70, 391,499.55 and 210,261.30 is: 315,391.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,999.70 : 391,499.55 = 210,261.30 : x
  2. Step 2: Convert to fraction form
    260,999.70/391,499.55 = 210,261.30/x
  3. Step 3: Cross multiply
    260,999.70x = 391,499.55 × 210,261.30
  4. Step 4: Simplify right side
    260,999.70x = 82,317,204,332.42
  5. Step 5: Solve for x
    x = 82,317,204,332.42/260,999.70
  6. Step 6: Final answer
    x = 315,391.95

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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.