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Finding the Fourth Proportional to 1,159.47, 1,599.73 and 687.16

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Solution

The fourth proportional to 1,159.47, 1,599.73 and 687.16 is: 948.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.47 : 1,599.73 = 687.16 : x
  2. Step 2: Convert to fraction form
    1,159.47/1,599.73 = 687.16/x
  3. Step 3: Cross multiply
    1,159.47x = 1,599.73 × 687.16
  4. Step 4: Simplify right side
    1,159.47x = 1,099,264.75
  5. Step 5: Solve for x
    x = 1,099,264.75/1,159.47
  6. Step 6: Final answer
    x = 948.08

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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.