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Finding the Fourth Proportional to 1,114.17, 1,537.89 and 666.22

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Solution

The fourth proportional to 1,114.17, 1,537.89 and 666.22 is: 919.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.17 : 1,537.89 = 666.22 : x
  2. Step 2: Convert to fraction form
    1,114.17/1,537.89 = 666.22/x
  3. Step 3: Cross multiply
    1,114.17x = 1,537.89 × 666.22
  4. Step 4: Simplify right side
    1,114.17x = 1,024,573.08
  5. Step 5: Solve for x
    x = 1,024,573.08/1,114.17
  6. Step 6: Final answer
    x = 919.58

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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.