Home / 667,320.80-1,000,505.64-312,141.20

Finding the Fourth Proportional to 667,320.80, 1,000,505.64 and 312,141.20

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Solution

The fourth proportional to 667,320.80, 1,000,505.64 and 312,141.20 is: 467,989.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,320.80 : 1,000,505.64 = 312,141.20 : x
  2. Step 2: Convert to fraction form
    667,320.80/1,000,505.64 = 312,141.20/x
  3. Step 3: Cross multiply
    667,320.80x = 1,000,505.64 × 312,141.20
  4. Step 4: Simplify right side
    667,320.80x = 312,299,031,076.37
  5. Step 5: Solve for x
    x = 312,299,031,076.37/667,320.80
  6. Step 6: Final answer
    x = 467,989.36

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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.