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Finding the Fourth Proportional to 667,250.74, 920,871.89 and 380,813.68

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Solution

The fourth proportional to 667,250.74, 920,871.89 and 380,813.68 is: 525,560.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,250.74 : 920,871.89 = 380,813.68 : x
  2. Step 2: Convert to fraction form
    667,250.74/920,871.89 = 380,813.68/x
  3. Step 3: Cross multiply
    667,250.74x = 920,871.89 × 380,813.68
  4. Step 4: Simplify right side
    667,250.74x = 350,680,613,239.46
  5. Step 5: Solve for x
    x = 350,680,613,239.46/667,250.74
  6. Step 6: Final answer
    x = 525,560.47

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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.