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Finding the Fourth Proportional to 400,658, 552,926.28 and 221,810

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Solution

The fourth proportional to 400,658, 552,926.28 and 221,810 is: 306,107.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,658 : 552,926.28 = 221,810 : x
  2. Step 2: Convert to fraction form
    400,658/552,926.28 = 221,810/x
  3. Step 3: Cross multiply
    400,658x = 552,926.28 × 221,810
  4. Step 4: Simplify right side
    400,658x = 122,644,578,166.80
  5. Step 5: Solve for x
    x = 122,644,578,166.80/400,658
  6. Step 6: Final answer
    x = 306,107.90

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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.