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Finding the Fourth Proportional to 795.12, 1,192.80 and 538.80

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Solution

The fourth proportional to 795.12, 1,192.80 and 538.80 is: 808.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    795.12 : 1,192.80 = 538.80 : x
  2. Step 2: Convert to fraction form
    795.12/1,192.80 = 538.80/x
  3. Step 3: Cross multiply
    795.12x = 1,192.80 × 538.80
  4. Step 4: Simplify right side
    795.12x = 642,680.64
  5. Step 5: Solve for x
    x = 642,680.64/795.12
  6. Step 6: Final answer
    x = 808.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.