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Finding the Fourth Proportional to 750.48, 1,126.29 and 490.41

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Solution

The fourth proportional to 750.48, 1,126.29 and 490.41 is: 735.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.48 : 1,126.29 = 490.41 : x
  2. Step 2: Convert to fraction form
    750.48/1,126.29 = 490.41/x
  3. Step 3: Cross multiply
    750.48x = 1,126.29 × 490.41
  4. Step 4: Simplify right side
    750.48x = 552,343.88
  5. Step 5: Solve for x
    x = 552,343.88/750.48
  6. Step 6: Final answer
    x = 735.99

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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.