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Finding the Fourth Proportional to 402,595.82, 555,589.14 and 221,315.39

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Solution

The fourth proportional to 402,595.82, 555,589.14 and 221,315.39 is: 305,419.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,595.82 : 555,589.14 = 221,315.39 : x
  2. Step 2: Convert to fraction form
    402,595.82/555,589.14 = 221,315.39/x
  3. Step 3: Cross multiply
    402,595.82x = 555,589.14 × 221,315.39
  4. Step 4: Simplify right side
    402,595.82x = 122,960,427,198.87
  5. Step 5: Solve for x
    x = 122,960,427,198.87/402,595.82
  6. Step 6: Final answer
    x = 305,419.04

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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.