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Finding the Fourth Proportional to 655, 897.36 and 630.40

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Solution

The fourth proportional to 655, 897.36 and 630.40 is: 863.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    655 : 897.36 = 630.40 : x
  2. Step 2: Convert to fraction form
    655/897.36 = 630.40/x
  3. Step 3: Cross multiply
    655x = 897.36 × 630.40
  4. Step 4: Simplify right side
    655x = 565,695.74
  5. Step 5: Solve for x
    x = 565,695.74/655
  6. Step 6: Final answer
    x = 863.66

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.