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Finding the Fourth Proportional to 1,696.32, 2,544.80 and 772.16

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Solution

The fourth proportional to 1,696.32, 2,544.80 and 772.16 is: 1,158.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,696.32 : 2,544.80 = 772.16 : x
  2. Step 2: Convert to fraction form
    1,696.32/2,544.80 = 772.16/x
  3. Step 3: Cross multiply
    1,696.32x = 2,544.80 × 772.16
  4. Step 4: Simplify right side
    1,696.32x = 1,964,992.77
  5. Step 5: Solve for x
    x = 1,964,992.77/1,696.32
  6. Step 6: Final answer
    x = 1,158.39

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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.