Home / 1,187,600.55-1,638,909.76-643,754.40

Finding the Fourth Proportional to 1,187,600.55, 1,638,909.76 and 643,754.40

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Solution

The fourth proportional to 1,187,600.55, 1,638,909.76 and 643,754.40 is: 888,392.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,600.55 : 1,638,909.76 = 643,754.40 : x
  2. Step 2: Convert to fraction form
    1,187,600.55/1,638,909.76 = 643,754.40/x
  3. Step 3: Cross multiply
    1,187,600.55x = 1,638,909.76 × 643,754.40
  4. Step 4: Simplify right side
    1,187,600.55x = 1,055,055,375,348.86
  5. Step 5: Solve for x
    x = 1,055,055,375,348.86/1,187,600.55
  6. Step 6: Final answer
    x = 888,392.46

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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.