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Finding the Fourth Proportional to 887.13, 1,329.26 and 642.51

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Solution

The fourth proportional to 887.13, 1,329.26 and 642.51 is: 962.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.13 : 1,329.26 = 642.51 : x
  2. Step 2: Convert to fraction form
    887.13/1,329.26 = 642.51/x
  3. Step 3: Cross multiply
    887.13x = 1,329.26 × 642.51
  4. Step 4: Simplify right side
    887.13x = 854,059.63
  5. Step 5: Solve for x
    x = 854,059.63/887.13
  6. Step 6: Final answer
    x = 962.72

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