Home / 1,218,777.12-1,681,916.40-667,493.28

Finding the Fourth Proportional to 1,218,777.12, 1,681,916.40 and 667,493.28

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Solution

The fourth proportional to 1,218,777.12, 1,681,916.40 and 667,493.28 is: 921,142.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,777.12 : 1,681,916.40 = 667,493.28 : x
  2. Step 2: Convert to fraction form
    1,218,777.12/1,681,916.40 = 667,493.28/x
  3. Step 3: Cross multiply
    1,218,777.12x = 1,681,916.40 × 667,493.28
  4. Step 4: Simplify right side
    1,218,777.12x = 1,122,667,894,521.79
  5. Step 5: Solve for x
    x = 1,122,667,894,521.79/1,218,777.12
  6. Step 6: Final answer
    x = 921,142.90

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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.