Home / 1,218,391.77-1,681,381.03-667,142.40

Finding the Fourth Proportional to 1,218,391.77, 1,681,381.03 and 667,142.40

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Solution

The fourth proportional to 1,218,391.77, 1,681,381.03 and 667,142.40 is: 920,656.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,391.77 : 1,681,381.03 = 667,142.40 : x
  2. Step 2: Convert to fraction form
    1,218,391.77/1,681,381.03 = 667,142.40/x
  3. Step 3: Cross multiply
    1,218,391.77x = 1,681,381.03 × 667,142.40
  4. Step 4: Simplify right side
    1,218,391.77x = 1,121,720,575,668.67
  5. Step 5: Solve for x
    x = 1,121,720,575,668.67/1,218,391.77
  6. Step 6: Final answer
    x = 920,656.72

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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.