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Finding the Fourth Proportional to 402,250.78, 555,109.59 and 220,966.39

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Solution

The fourth proportional to 402,250.78, 555,109.59 and 220,966.39 is: 304,935.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,250.78 : 555,109.59 = 220,966.39 : x
  2. Step 2: Convert to fraction form
    402,250.78/555,109.59 = 220,966.39/x
  3. Step 3: Cross multiply
    402,250.78x = 555,109.59 × 220,966.39
  4. Step 4: Simplify right side
    402,250.78x = 122,660,562,156.68
  5. Step 5: Solve for x
    x = 122,660,562,156.68/402,250.78
  6. Step 6: Final answer
    x = 304,935.55

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1.5x scale

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.