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Finding the Fourth Proportional to 260,785.80, 391,437.90 and 127,816.20

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Solution

The fourth proportional to 260,785.80, 391,437.90 and 127,816.20 is: 191,851.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,785.80 : 391,437.90 = 127,816.20 : x
  2. Step 2: Convert to fraction form
    260,785.80/391,437.90 = 127,816.20/x
  3. Step 3: Cross multiply
    260,785.80x = 391,437.90 × 127,816.20
  4. Step 4: Simplify right side
    260,785.80x = 50,032,104,913.98
  5. Step 5: Solve for x
    x = 50,032,104,913.98/260,785.80
  6. Step 6: Final answer
    x = 191,851.34

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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.