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Finding the Fourth Proportional to 1,479.77, 2,042.01 and 816.68

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Solution

The fourth proportional to 1,479.77, 2,042.01 and 816.68 is: 1,126.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.77 : 2,042.01 = 816.68 : x
  2. Step 2: Convert to fraction form
    1,479.77/2,042.01 = 816.68/x
  3. Step 3: Cross multiply
    1,479.77x = 2,042.01 × 816.68
  4. Step 4: Simplify right side
    1,479.77x = 1,667,673.83
  5. Step 5: Solve for x
    x = 1,667,673.83/1,479.77
  6. Step 6: Final answer
    x = 1,126.98

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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.