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Finding the Fourth Proportional to 1,147.71, 1,583.56 and 699.58

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Solution

The fourth proportional to 1,147.71, 1,583.56 and 699.58 is: 965.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.71 : 1,583.56 = 699.58 : x
  2. Step 2: Convert to fraction form
    1,147.71/1,583.56 = 699.58/x
  3. Step 3: Cross multiply
    1,147.71x = 1,583.56 × 699.58
  4. Step 4: Simplify right side
    1,147.71x = 1,107,829.76
  5. Step 5: Solve for x
    x = 1,107,829.76/1,147.71
  6. Step 6: Final answer
    x = 965.25

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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.