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Finding the Fourth Proportional to 753.29, 1,130.10 and 445.42

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Solution

The fourth proportional to 753.29, 1,130.10 and 445.42 is: 668.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.29 : 1,130.10 = 445.42 : x
  2. Step 2: Convert to fraction form
    753.29/1,130.10 = 445.42/x
  3. Step 3: Cross multiply
    753.29x = 1,130.10 × 445.42
  4. Step 4: Simplify right side
    753.29x = 503,369.14
  5. Step 5: Solve for x
    x = 503,369.14/753.29
  6. Step 6: Final answer
    x = 668.23

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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.