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Finding the Fourth Proportional to 1,477.88, 2,039.60 and 814.86

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Solution

The fourth proportional to 1,477.88, 2,039.60 and 814.86 is: 1,124.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,477.88 : 2,039.60 = 814.86 : x
  2. Step 2: Convert to fraction form
    1,477.88/2,039.60 = 814.86/x
  3. Step 3: Cross multiply
    1,477.88x = 2,039.60 × 814.86
  4. Step 4: Simplify right side
    1,477.88x = 1,661,988.46
  5. Step 5: Solve for x
    x = 1,661,988.46/1,477.88
  6. Step 6: Final answer
    x = 1,124.58

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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.