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Finding the Fourth Proportional to 615,178.20, 921,989.70 and 298,954.20

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Solution

The fourth proportional to 615,178.20, 921,989.70 and 298,954.20 is: 448,053.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,178.20 : 921,989.70 = 298,954.20 : x
  2. Step 2: Convert to fraction form
    615,178.20/921,989.70 = 298,954.20/x
  3. Step 3: Cross multiply
    615,178.20x = 921,989.70 × 298,954.20
  4. Step 4: Simplify right side
    615,178.20x = 275,632,693,171.74
  5. Step 5: Solve for x
    x = 275,632,693,171.74/615,178.20
  6. Step 6: Final answer
    x = 448,053.41

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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.