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Finding the Fourth Proportional to 445,271.40, 667,842.30 and 129,695.40

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Solution

The fourth proportional to 445,271.40, 667,842.30 and 129,695.40 is: 194,524.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,271.40 : 667,842.30 = 129,695.40 : x
  2. Step 2: Convert to fraction form
    445,271.40/667,842.30 = 129,695.40/x
  3. Step 3: Cross multiply
    445,271.40x = 667,842.30 × 129,695.40
  4. Step 4: Simplify right side
    445,271.40x = 86,616,074,235.42
  5. Step 5: Solve for x
    x = 86,616,074,235.42/445,271.40
  6. Step 6: Final answer
    x = 194,524.23

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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.