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Finding the Fourth Proportional to 615,903.20, 923,725.20 and 260,928.80

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Solution

The fourth proportional to 615,903.20, 923,725.20 and 260,928.80 is: 391,338.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,903.20 : 923,725.20 = 260,928.80 : x
  2. Step 2: Convert to fraction form
    615,903.20/923,725.20 = 260,928.80/x
  3. Step 3: Cross multiply
    615,903.20x = 923,725.20 × 260,928.80
  4. Step 4: Simplify right side
    615,903.20x = 241,026,507,965.76
  5. Step 5: Solve for x
    x = 241,026,507,965.76/615,903.20
  6. Step 6: Final answer
    x = 391,338.29

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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.