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Finding the Fourth Proportional to 667,385.73, 921,039.54 and 380,948.87

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Solution

The fourth proportional to 667,385.73, 921,039.54 and 380,948.87 is: 525,736.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,385.73 : 921,039.54 = 380,948.87 : x
  2. Step 2: Convert to fraction form
    667,385.73/921,039.54 = 380,948.87/x
  3. Step 3: Cross multiply
    667,385.73x = 921,039.54 × 380,948.87
  4. Step 4: Simplify right side
    667,385.73x = 350,868,967,383.12
  5. Step 5: Solve for x
    x = 350,868,967,383.12/667,385.73
  6. Step 6: Final answer
    x = 525,736.39

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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.