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Finding the Fourth Proportional to 1,159.48, 1,599.69 and 687.23

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Solution

The fourth proportional to 1,159.48, 1,599.69 and 687.23 is: 948.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.48 : 1,599.69 = 687.23 : x
  2. Step 2: Convert to fraction form
    1,159.48/1,599.69 = 687.23/x
  3. Step 3: Cross multiply
    1,159.48x = 1,599.69 × 687.23
  4. Step 4: Simplify right side
    1,159.48x = 1,099,354.96
  5. Step 5: Solve for x
    x = 1,099,354.96/1,159.48
  6. Step 6: Final answer
    x = 948.14

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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.