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Finding the Fourth Proportional to 761.10, 1,049.94 and 450.60

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Solution

The fourth proportional to 761.10, 1,049.94 and 450.60 is: 621.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.10 : 1,049.94 = 450.60 : x
  2. Step 2: Convert to fraction form
    761.10/1,049.94 = 450.60/x
  3. Step 3: Cross multiply
    761.10x = 1,049.94 × 450.60
  4. Step 4: Simplify right side
    761.10x = 473,102.96
  5. Step 5: Solve for x
    x = 473,102.96/761.10
  6. Step 6: Final answer
    x = 621.60

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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.