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Finding the Fourth Proportional to 1,478.03, 2,039.63 and 814.85

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Solution

The fourth proportional to 1,478.03, 2,039.63 and 814.85 is: 1,124.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.03 : 2,039.63 = 814.85 : x
  2. Step 2: Convert to fraction form
    1,478.03/2,039.63 = 814.85/x
  3. Step 3: Cross multiply
    1,478.03x = 2,039.63 × 814.85
  4. Step 4: Simplify right side
    1,478.03x = 1,661,978.23
  5. Step 5: Solve for x
    x = 1,661,978.23/1,478.03
  6. Step 6: Final answer
    x = 1,124.46

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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.