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Finding the Fourth Proportional to 1,224.15, 1,835.37 and 980.61

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Solution

The fourth proportional to 1,224.15, 1,835.37 and 980.61 is: 1,470.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,224.15 : 1,835.37 = 980.61 : x
  2. Step 2: Convert to fraction form
    1,224.15/1,835.37 = 980.61/x
  3. Step 3: Cross multiply
    1,224.15x = 1,835.37 × 980.61
  4. Step 4: Simplify right side
    1,224.15x = 1,799,782.18
  5. Step 5: Solve for x
    x = 1,799,782.18/1,224.15
  6. Step 6: Final answer
    x = 1,470.23

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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.