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Finding the Fourth Proportional to 798.04, 1,101.54 and 623.80

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Solution

The fourth proportional to 798.04, 1,101.54 and 623.80 is: 861.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.04 : 1,101.54 = 623.80 : x
  2. Step 2: Convert to fraction form
    798.04/1,101.54 = 623.80/x
  3. Step 3: Cross multiply
    798.04x = 1,101.54 × 623.80
  4. Step 4: Simplify right side
    798.04x = 687,140.65
  5. Step 5: Solve for x
    x = 687,140.65/798.04
  6. Step 6: Final answer
    x = 861.04

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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.