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Finding the Fourth Proportional to 816.82, 1,127.80 and 502.51

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Solution

The fourth proportional to 816.82, 1,127.80 and 502.51 is: 693.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.82 : 1,127.80 = 502.51 : x
  2. Step 2: Convert to fraction form
    816.82/1,127.80 = 502.51/x
  3. Step 3: Cross multiply
    816.82x = 1,127.80 × 502.51
  4. Step 4: Simplify right side
    816.82x = 566,730.78
  5. Step 5: Solve for x
    x = 566,730.78/816.82
  6. Step 6: Final answer
    x = 693.83

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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.