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Finding the Fourth Proportional to 615,076.20, 921,866.25 and 435,213.45

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Solution

The fourth proportional to 615,076.20, 921,866.25 and 435,213.45 is: 652,290.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,076.20 : 921,866.25 = 435,213.45 : x
  2. Step 2: Convert to fraction form
    615,076.20/921,866.25 = 435,213.45/x
  3. Step 3: Cross multiply
    615,076.20x = 921,866.25 × 435,213.45
  4. Step 4: Simplify right side
    615,076.20x = 401,208,591,101.06
  5. Step 5: Solve for x
    x = 401,208,591,101.06/615,076.20
  6. Step 6: Final answer
    x = 652,290.87

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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.