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Finding the Fourth Proportional to 402,607.25, 555,605.03 and 221,326.82

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Solution

The fourth proportional to 402,607.25, 555,605.03 and 221,326.82 is: 305,434.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,607.25 : 555,605.03 = 221,326.82 : x
  2. Step 2: Convert to fraction form
    402,607.25/555,605.03 = 221,326.82/x
  3. Step 3: Cross multiply
    402,607.25x = 555,605.03 × 221,326.82
  4. Step 4: Simplify right side
    402,607.25x = 122,970,293,359.27
  5. Step 5: Solve for x
    x = 122,970,293,359.27/402,607.25
  6. Step 6: Final answer
    x = 305,434.87

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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.