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Finding the Fourth Proportional to 1,218.56, 1,823.88 and 893.84

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Solution

The fourth proportional to 1,218.56, 1,823.88 and 893.84 is: 1,337.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.56 : 1,823.88 = 893.84 : x
  2. Step 2: Convert to fraction form
    1,218.56/1,823.88 = 893.84/x
  3. Step 3: Cross multiply
    1,218.56x = 1,823.88 × 893.84
  4. Step 4: Simplify right side
    1,218.56x = 1,630,256.90
  5. Step 5: Solve for x
    x = 1,630,256.90/1,218.56
  6. Step 6: Final answer
    x = 1,337.86

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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.