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Finding the Fourth Proportional to 1,163.93, 1,606.10 and 666.59

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Solution

The fourth proportional to 1,163.93, 1,606.10 and 666.59 is: 919.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,163.93 : 1,606.10 = 666.59 : x
  2. Step 2: Convert to fraction form
    1,163.93/1,606.10 = 666.59/x
  3. Step 3: Cross multiply
    1,163.93x = 1,606.10 × 666.59
  4. Step 4: Simplify right side
    1,163.93x = 1,070,598.84
  5. Step 5: Solve for x
    x = 1,070,598.84/1,163.93
  6. Step 6: Final answer
    x = 919.82

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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.