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Finding the Fourth Proportional to 615,680.40, 921,965.40 and 404,173.20

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Solution

The fourth proportional to 615,680.40, 921,965.40 and 404,173.20 is: 605,238.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,680.40 : 921,965.40 = 404,173.20 : x
  2. Step 2: Convert to fraction form
    615,680.40/921,965.40 = 404,173.20/x
  3. Step 3: Cross multiply
    615,680.40x = 921,965.40 × 404,173.20
  4. Step 4: Simplify right side
    615,680.40x = 372,633,706,007.28
  5. Step 5: Solve for x
    x = 372,633,706,007.28/615,680.40
  6. Step 6: Final answer
    x = 605,238.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.