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Finding the Fourth Proportional to 672,891.90, 1,009,888.65 and 667,643.10

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Solution

The fourth proportional to 672,891.90, 1,009,888.65 and 667,643.10 is: 1,002,011.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,891.90 : 1,009,888.65 = 667,643.10 : x
  2. Step 2: Convert to fraction form
    672,891.90/1,009,888.65 = 667,643.10/x
  3. Step 3: Cross multiply
    672,891.90x = 1,009,888.65 × 667,643.10
  4. Step 4: Simplify right side
    672,891.90x = 674,245,188,940.82
  5. Step 5: Solve for x
    x = 674,245,188,940.82/672,891.90
  6. Step 6: Final answer
    x = 1,002,011.15

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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.