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Finding the Fourth Proportional to 1,174.07, 1,618.72 and 753.66

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Solution

The fourth proportional to 1,174.07, 1,618.72 and 753.66 is: 1,039.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.07 : 1,618.72 = 753.66 : x
  2. Step 2: Convert to fraction form
    1,174.07/1,618.72 = 753.66/x
  3. Step 3: Cross multiply
    1,174.07x = 1,618.72 × 753.66
  4. Step 4: Simplify right side
    1,174.07x = 1,219,962.63
  5. Step 5: Solve for x
    x = 1,219,962.63/1,174.07
  6. Step 6: Final answer
    x = 1,039.09

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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.