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Finding the Fourth Proportional to 795.13, 1,098.71 and 621.79

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Solution

The fourth proportional to 795.13, 1,098.71 and 621.79 is: 859.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    795.13 : 1,098.71 = 621.79 : x
  2. Step 2: Convert to fraction form
    795.13/1,098.71 = 621.79/x
  3. Step 3: Cross multiply
    795.13x = 1,098.71 × 621.79
  4. Step 4: Simplify right side
    795.13x = 683,163.78
  5. Step 5: Solve for x
    x = 683,163.78/795.13
  6. Step 6: Final answer
    x = 859.19

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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.