Home / 1,663.50-2,295.78-1,215.54

Finding the Fourth Proportional to 1,663.50, 2,295.78 and 1,215.54

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Solution

The fourth proportional to 1,663.50, 2,295.78 and 1,215.54 is: 1,677.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,663.50 : 2,295.78 = 1,215.54 : x
  2. Step 2: Convert to fraction form
    1,663.50/2,295.78 = 1,215.54/x
  3. Step 3: Cross multiply
    1,663.50x = 2,295.78 × 1,215.54
  4. Step 4: Simplify right side
    1,663.50x = 2,790,612.42
  5. Step 5: Solve for x
    x = 2,790,612.42/1,663.50
  6. Step 6: Final answer
    x = 1,677.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.