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Finding the Fourth Proportional to 402,672.74, 555,689.49 and 221,403.20

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Solution

The fourth proportional to 402,672.74, 555,689.49 and 221,403.20 is: 305,537.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,672.74 : 555,689.49 = 221,403.20 : x
  2. Step 2: Convert to fraction form
    402,672.74/555,689.49 = 221,403.20/x
  3. Step 3: Cross multiply
    402,672.74x = 555,689.49 × 221,403.20
  4. Step 4: Simplify right side
    402,672.74x = 123,031,431,292.37
  5. Step 5: Solve for x
    x = 123,031,431,292.37/402,672.74
  6. Step 6: Final answer
    x = 305,537.03

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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.