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Finding the Fourth Proportional to 1,214.64, 1,822.32 and 636.48

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Solution

The fourth proportional to 1,214.64, 1,822.32 and 636.48 is: 954.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.64 : 1,822.32 = 636.48 : x
  2. Step 2: Convert to fraction form
    1,214.64/1,822.32 = 636.48/x
  3. Step 3: Cross multiply
    1,214.64x = 1,822.32 × 636.48
  4. Step 4: Simplify right side
    1,214.64x = 1,159,870.23
  5. Step 5: Solve for x
    x = 1,159,870.23/1,214.64
  6. Step 6: Final answer
    x = 954.91

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Why These Related Problems?

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