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Finding the Fourth Proportional to 1,107.02, 1,660.48 and 285.30

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Solution

The fourth proportional to 1,107.02, 1,660.48 and 285.30 is: 427.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.02 : 1,660.48 = 285.30 : x
  2. Step 2: Convert to fraction form
    1,107.02/1,660.48 = 285.30/x
  3. Step 3: Cross multiply
    1,107.02x = 1,660.48 × 285.30
  4. Step 4: Simplify right side
    1,107.02x = 473,734.94
  5. Step 5: Solve for x
    x = 473,734.94/1,107.02
  6. Step 6: Final answer
    x = 427.94

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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.