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Finding the Fourth Proportional to 404,978.31, 558,875.43 and 223,689.78

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Solution

The fourth proportional to 404,978.31, 558,875.43 and 223,689.78 is: 308,694.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,978.31 : 558,875.43 = 223,689.78 : x
  2. Step 2: Convert to fraction form
    404,978.31/558,875.43 = 223,689.78/x
  3. Step 3: Cross multiply
    404,978.31x = 558,875.43 × 223,689.78
  4. Step 4: Simplify right side
    404,978.31x = 125,014,721,984.11
  5. Step 5: Solve for x
    x = 125,014,721,984.11/404,978.31
  6. Step 6: Final answer
    x = 308,694.86

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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.