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Finding the Fourth Proportional to 753.62, 1,130.61 and 266.72

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Solution

The fourth proportional to 753.62, 1,130.61 and 266.72 is: 400.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.62 : 1,130.61 = 266.72 : x
  2. Step 2: Convert to fraction form
    753.62/1,130.61 = 266.72/x
  3. Step 3: Cross multiply
    753.62x = 1,130.61 × 266.72
  4. Step 4: Simplify right side
    753.62x = 301,556.30
  5. Step 5: Solve for x
    x = 301,556.30/753.62
  6. Step 6: Final answer
    x = 400.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.