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Finding the Fourth Proportional to 445,000.40, 667,435.80 and 129,424.40

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Solution

The fourth proportional to 445,000.40, 667,435.80 and 129,424.40 is: 194,117.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,000.40 : 667,435.80 = 129,424.40 : x
  2. Step 2: Convert to fraction form
    445,000.40/667,435.80 = 129,424.40/x
  3. Step 3: Cross multiply
    445,000.40x = 667,435.80 × 129,424.40
  4. Step 4: Simplify right side
    445,000.40x = 86,382,477,953.52
  5. Step 5: Solve for x
    x = 86,382,477,953.52/445,000.40
  6. Step 6: Final answer
    x = 194,117.75

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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.