Home / 644,123,808.96-888,928,912.80-485,073,321.24

Finding the Fourth Proportional to 644,123,808.96, 888,928,912.80 and 485,073,321.24

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Solution

The fourth proportional to 644,123,808.96, 888,928,912.80 and 485,073,321.24 is: 669,429,842.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,123,808.96 : 888,928,912.80 = 485,073,321.24 : x
  2. Step 2: Convert to fraction form
    644,123,808.96/888,928,912.80 = 485,073,321.24/x
  3. Step 3: Cross multiply
    644,123,808.96x = 888,928,912.80 × 485,073,321.24
  4. Step 4: Simplify right side
    644,123,808.96x = 431,195,700,078,158,336
  5. Step 5: Solve for x
    x = 431,195,700,078,158,336/644,123,808.96
  6. Step 6: Final answer
    x = 669,429,842.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.