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Finding the Fourth Proportional to 402,658.31, 555,654.31 and 221,368.93

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Solution

The fourth proportional to 402,658.31, 555,654.31 and 221,368.93 is: 305,481.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,658.31 : 555,654.31 = 221,368.93 : x
  2. Step 2: Convert to fraction form
    402,658.31/555,654.31 = 221,368.93/x
  3. Step 3: Cross multiply
    402,658.31x = 555,654.31 × 221,368.93
  4. Step 4: Simplify right side
    402,658.31x = 123,004,598,112.03
  5. Step 5: Solve for x
    x = 123,004,598,112.03/402,658.31
  6. Step 6: Final answer
    x = 305,481.33

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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.