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Finding the Fourth Proportional to 1,647.60, 2,470.76 and 673.36

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Solution

The fourth proportional to 1,647.60, 2,470.76 and 673.36 is: 1,009.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,647.60 : 2,470.76 = 673.36 : x
  2. Step 2: Convert to fraction form
    1,647.60/2,470.76 = 673.36/x
  3. Step 3: Cross multiply
    1,647.60x = 2,470.76 × 673.36
  4. Step 4: Simplify right side
    1,647.60x = 1,663,710.95
  5. Step 5: Solve for x
    x = 1,663,710.95/1,647.60
  6. Step 6: Final answer
    x = 1,009.78

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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.