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Finding the Fourth Proportional to 822.48, 1,133.88 and 624.96

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Solution

The fourth proportional to 822.48, 1,133.88 and 624.96 is: 861.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.48 : 1,133.88 = 624.96 : x
  2. Step 2: Convert to fraction form
    822.48/1,133.88 = 624.96/x
  3. Step 3: Cross multiply
    822.48x = 1,133.88 × 624.96
  4. Step 4: Simplify right side
    822.48x = 708,629.64
  5. Step 5: Solve for x
    x = 708,629.64/822.48
  6. Step 6: Final answer
    x = 861.58

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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.