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Finding the Fourth Proportional to 1,159.12, 1,599.78 and 693.46

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Solution

The fourth proportional to 1,159.12, 1,599.78 and 693.46 is: 957.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.12 : 1,599.78 = 693.46 : x
  2. Step 2: Convert to fraction form
    1,159.12/1,599.78 = 693.46/x
  3. Step 3: Cross multiply
    1,159.12x = 1,599.78 × 693.46
  4. Step 4: Simplify right side
    1,159.12x = 1,109,383.44
  5. Step 5: Solve for x
    x = 1,109,383.44/1,159.12
  6. Step 6: Final answer
    x = 957.09

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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.