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Finding the Fourth Proportional to 924, 1,386.96 and 636

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Solution

The fourth proportional to 924, 1,386.96 and 636 is: 954.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    924 : 1,386.96 = 636 : x
  2. Step 2: Convert to fraction form
    924/1,386.96 = 636/x
  3. Step 3: Cross multiply
    924x = 1,386.96 × 636
  4. Step 4: Simplify right side
    924x = 882,106.56
  5. Step 5: Solve for x
    x = 882,106.56/924
  6. Step 6: Final answer
    x = 954.66

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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.