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Finding the Fourth Proportional to 402,209.48, 555,053.64 and 220,925.66

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Solution

The fourth proportional to 402,209.48, 555,053.64 and 220,925.66 is: 304,879.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,209.48 : 555,053.64 = 220,925.66 : x
  2. Step 2: Convert to fraction form
    402,209.48/555,053.64 = 220,925.66/x
  3. Step 3: Cross multiply
    402,209.48x = 555,053.64 × 220,925.66
  4. Step 4: Simplify right side
    402,209.48x = 122,625,591,752.40
  5. Step 5: Solve for x
    x = 122,625,591,752.40/402,209.48
  6. Step 6: Final answer
    x = 304,879.91

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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.