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Finding the Fourth Proportional to 666,986.87, 1,000,481.68 and 312,250.01

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Solution

The fourth proportional to 666,986.87, 1,000,481.68 and 312,250.01 is: 468,375.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,986.87 : 1,000,481.68 = 312,250.01 : x
  2. Step 2: Convert to fraction form
    666,986.87/1,000,481.68 = 312,250.01/x
  3. Step 3: Cross multiply
    666,986.87x = 1,000,481.68 × 312,250.01
  4. Step 4: Simplify right side
    666,986.87x = 312,400,408,216.32
  5. Step 5: Solve for x
    x = 312,400,408,216.32/666,986.87
  6. Step 6: Final answer
    x = 468,375.65

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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.