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Finding the Fourth Proportional to 1,743.86, 2,615.79 and 648.50

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Solution

The fourth proportional to 1,743.86, 2,615.79 and 648.50 is: 972.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,743.86 : 2,615.79 = 648.50 : x
  2. Step 2: Convert to fraction form
    1,743.86/2,615.79 = 648.50/x
  3. Step 3: Cross multiply
    1,743.86x = 2,615.79 × 648.50
  4. Step 4: Simplify right side
    1,743.86x = 1,696,339.82
  5. Step 5: Solve for x
    x = 1,696,339.82/1,743.86
  6. Step 6: Final answer
    x = 972.75

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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.