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Finding the Fourth Proportional to 642,187.88, 886,219.26 and 355,726.52

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Solution

The fourth proportional to 642,187.88, 886,219.26 and 355,726.52 is: 490,902.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,187.88 : 886,219.26 = 355,726.52 : x
  2. Step 2: Convert to fraction form
    642,187.88/886,219.26 = 355,726.52/x
  3. Step 3: Cross multiply
    642,187.88x = 886,219.26 × 355,726.52
  4. Step 4: Simplify right side
    642,187.88x = 315,251,693,316.78
  5. Step 5: Solve for x
    x = 315,251,693,316.78/642,187.88
  6. Step 6: Final answer
    x = 490,902.59

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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.