Home / 667,449.28-921,208.08-521,966.80

Finding the Fourth Proportional to 667,449.28, 921,208.08 and 521,966.80

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Solution

The fourth proportional to 667,449.28, 921,208.08 and 521,966.80 is: 720,414.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,449.28 : 921,208.08 = 521,966.80 : x
  2. Step 2: Convert to fraction form
    667,449.28/921,208.08 = 521,966.80/x
  3. Step 3: Cross multiply
    667,449.28x = 921,208.08 × 521,966.80
  4. Step 4: Simplify right side
    667,449.28x = 480,840,033,651.74
  5. Step 5: Solve for x
    x = 480,840,033,651.74/667,449.28
  6. Step 6: Final answer
    x = 720,414.34

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1.5x scale

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.