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Finding the Fourth Proportional to 880.84, 1,215.30 and 648.04

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Solution

The fourth proportional to 880.84, 1,215.30 and 648.04 is: 894.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.84 : 1,215.30 = 648.04 : x
  2. Step 2: Convert to fraction form
    880.84/1,215.30 = 648.04/x
  3. Step 3: Cross multiply
    880.84x = 1,215.30 × 648.04
  4. Step 4: Simplify right side
    880.84x = 787,563.01
  5. Step 5: Solve for x
    x = 787,563.01/880.84
  6. Step 6: Final answer
    x = 894.10

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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.