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Finding the Fourth Proportional to 887.14, 1,223.58 and 787.66

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Solution

The fourth proportional to 887.14, 1,223.58 and 787.66 is: 1,086.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.14 : 1,223.58 = 787.66 : x
  2. Step 2: Convert to fraction form
    887.14/1,223.58 = 787.66/x
  3. Step 3: Cross multiply
    887.14x = 1,223.58 × 787.66
  4. Step 4: Simplify right side
    887.14x = 963,765.02
  5. Step 5: Solve for x
    x = 963,765.02/887.14
  6. Step 6: Final answer
    x = 1,086.37

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1.5x scale

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.