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Finding the Fourth Proportional to 260,455.44, 390,711.81 and 82,900.20

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Solution

The fourth proportional to 260,455.44, 390,711.81 and 82,900.20 is: 124,359.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,455.44 : 390,711.81 = 82,900.20 : x
  2. Step 2: Convert to fraction form
    260,455.44/390,711.81 = 82,900.20/x
  3. Step 3: Cross multiply
    260,455.44x = 390,711.81 × 82,900.20
  4. Step 4: Simplify right side
    260,455.44x = 32,390,087,191.36
  5. Step 5: Solve for x
    x = 32,390,087,191.36/260,455.44
  6. Step 6: Final answer
    x = 124,359.42

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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.