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Finding the Fourth Proportional to 667,672.80, 1,001,509.20 and 644,053.20

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Solution

The fourth proportional to 667,672.80, 1,001,509.20 and 644,053.20 is: 966,079.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,672.80 : 1,001,509.20 = 644,053.20 : x
  2. Step 2: Convert to fraction form
    667,672.80/1,001,509.20 = 644,053.20/x
  3. Step 3: Cross multiply
    667,672.80x = 1,001,509.20 × 644,053.20
  4. Step 4: Simplify right side
    667,672.80x = 645,025,205,089.44
  5. Step 5: Solve for x
    x = 645,025,205,089.44/667,672.80
  6. Step 6: Final answer
    x = 966,079.80

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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.