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Finding the Fourth Proportional to 697.28, 1,045.78 and 450.50

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Solution

The fourth proportional to 697.28, 1,045.78 and 450.50 is: 675.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.28 : 1,045.78 = 450.50 : x
  2. Step 2: Convert to fraction form
    697.28/1,045.78 = 450.50/x
  3. Step 3: Cross multiply
    697.28x = 1,045.78 × 450.50
  4. Step 4: Simplify right side
    697.28x = 471,117.53
  5. Step 5: Solve for x
    x = 471,117.53/697.28
  6. Step 6: Final answer
    x = 675.66

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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.