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Finding the Fourth Proportional to 667,248.74, 920,869.13 and 380,811.68

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Solution

The fourth proportional to 667,248.74, 920,869.13 and 380,811.68 is: 525,557.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,248.74 : 920,869.13 = 380,811.68 : x
  2. Step 2: Convert to fraction form
    667,248.74/920,869.13 = 380,811.68/x
  3. Step 3: Cross multiply
    667,248.74x = 920,869.13 × 380,811.68
  4. Step 4: Simplify right side
    667,248.74x = 350,677,718,551.38
  5. Step 5: Solve for x
    x = 350,677,718,551.38/667,248.74
  6. Step 6: Final answer
    x = 525,557.71

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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.