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Finding the Fourth Proportional to 822.58, 1,133.96 and 625.75

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Solution

The fourth proportional to 822.58, 1,133.96 and 625.75 is: 862.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.58 : 1,133.96 = 625.75 : x
  2. Step 2: Convert to fraction form
    822.58/1,133.96 = 625.75/x
  3. Step 3: Cross multiply
    822.58x = 1,133.96 × 625.75
  4. Step 4: Simplify right side
    822.58x = 709,569.51
  5. Step 5: Solve for x
    x = 709,569.51/822.58
  6. Step 6: Final answer
    x = 862.62

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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.