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Finding the Fourth Proportional to 402,451.31, 555,053.22 and 249,383.18

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Solution

The fourth proportional to 402,451.31, 555,053.22 and 249,383.18 is: 343,944.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,451.31 : 555,053.22 = 249,383.18 : x
  2. Step 2: Convert to fraction form
    402,451.31/555,053.22 = 249,383.18/x
  3. Step 3: Cross multiply
    402,451.31x = 555,053.22 × 249,383.18
  4. Step 4: Simplify right side
    402,451.31x = 138,420,934,297.57
  5. Step 5: Solve for x
    x = 138,420,934,297.57/402,451.31
  6. Step 6: Final answer
    x = 343,944.55

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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.