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Finding the Fourth Proportional to 260,785.80, 391,178.70 and 248,538.60

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Solution

The fourth proportional to 260,785.80, 391,178.70 and 248,538.60 is: 372,807.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,785.80 : 391,178.70 = 248,538.60 : x
  2. Step 2: Convert to fraction form
    260,785.80/391,178.70 = 248,538.60/x
  3. Step 3: Cross multiply
    260,785.80x = 391,178.70 × 248,538.60
  4. Step 4: Simplify right side
    260,785.80x = 97,223,006,447.82
  5. Step 5: Solve for x
    x = 97,223,006,447.82/260,785.80
  6. Step 6: Final answer
    x = 372,807.90

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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.