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Finding the Fourth Proportional to 402,488.82, 555,407.67 and 221,196.87

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Solution

The fourth proportional to 402,488.82, 555,407.67 and 221,196.87 is: 305,236.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,488.82 : 555,407.67 = 221,196.87 : x
  2. Step 2: Convert to fraction form
    402,488.82/555,407.67 = 221,196.87/x
  3. Step 3: Cross multiply
    402,488.82x = 555,407.67 × 221,196.87
  4. Step 4: Simplify right side
    402,488.82x = 122,854,438,177.99
  5. Step 5: Solve for x
    x = 122,854,438,177.99/402,488.82
  6. Step 6: Final answer
    x = 305,236.90

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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.