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Finding the Fourth Proportional to 1,184.04, 1,633.94 and 686.66

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Solution

The fourth proportional to 1,184.04, 1,633.94 and 686.66 is: 947.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,184.04 : 1,633.94 = 686.66 : x
  2. Step 2: Convert to fraction form
    1,184.04/1,633.94 = 686.66/x
  3. Step 3: Cross multiply
    1,184.04x = 1,633.94 × 686.66
  4. Step 4: Simplify right side
    1,184.04x = 1,121,952.21
  5. Step 5: Solve for x
    x = 1,121,952.21/1,184.04
  6. Step 6: Final answer
    x = 947.56

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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.