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Finding the Fourth Proportional to 690,615, 1,036,392.30 and 247,383

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Solution

The fourth proportional to 690,615, 1,036,392.30 and 247,383 is: 371,242.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,615 : 1,036,392.30 = 247,383 : x
  2. Step 2: Convert to fraction form
    690,615/1,036,392.30 = 247,383/x
  3. Step 3: Cross multiply
    690,615x = 1,036,392.30 × 247,383
  4. Step 4: Simplify right side
    690,615x = 256,385,836,350.90
  5. Step 5: Solve for x
    x = 256,385,836,350.90/690,615
  6. Step 6: Final answer
    x = 371,242.79

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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.