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Finding the Fourth Proportional to 2,280, 3,146.34 and 1,285.38

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Solution

The fourth proportional to 2,280, 3,146.34 and 1,285.38 is: 1,773.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280 : 3,146.34 = 1,285.38 : x
  2. Step 2: Convert to fraction form
    2,280/3,146.34 = 1,285.38/x
  3. Step 3: Cross multiply
    2,280x = 3,146.34 × 1,285.38
  4. Step 4: Simplify right side
    2,280x = 4,044,242.51
  5. Step 5: Solve for x
    x = 4,044,242.51/2,280
  6. Step 6: Final answer
    x = 1,773.79

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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.