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Finding the Fourth Proportional to 400,718, 552,990.84 and 221,881.52

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Solution

The fourth proportional to 400,718, 552,990.84 and 221,881.52 is: 306,196.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,718 : 552,990.84 = 221,881.52 : x
  2. Step 2: Convert to fraction form
    400,718/552,990.84 = 221,881.52/x
  3. Step 3: Cross multiply
    400,718x = 552,990.84 × 221,881.52
  4. Step 4: Simplify right side
    400,718x = 122,698,448,125.28
  5. Step 5: Solve for x
    x = 122,698,448,125.28/400,718
  6. Step 6: Final answer
    x = 306,196.50

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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.