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Finding the Fourth Proportional to 893.57, 1,334.99 and 862.88

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Solution

The fourth proportional to 893.57, 1,334.99 and 862.88 is: 1,289.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.57 : 1,334.99 = 862.88 : x
  2. Step 2: Convert to fraction form
    893.57/1,334.99 = 862.88/x
  3. Step 3: Cross multiply
    893.57x = 1,334.99 × 862.88
  4. Step 4: Simplify right side
    893.57x = 1,151,931.65
  5. Step 5: Solve for x
    x = 1,151,931.65/893.57
  6. Step 6: Final answer
    x = 1,289.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.