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Finding the Fourth Proportional to 842.53, 1,162.70 and 548.30

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Solution

The fourth proportional to 842.53, 1,162.70 and 548.30 is: 756.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.53 : 1,162.70 = 548.30 : x
  2. Step 2: Convert to fraction form
    842.53/1,162.70 = 548.30/x
  3. Step 3: Cross multiply
    842.53x = 1,162.70 × 548.30
  4. Step 4: Simplify right side
    842.53x = 637,504.22
  5. Step 5: Solve for x
    x = 637,504.22/842.53
  6. Step 6: Final answer
    x = 756.65

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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.