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Finding the Fourth Proportional to 1,270.89, 1,902.84 and 653.27

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Solution

The fourth proportional to 1,270.89, 1,902.84 and 653.27 is: 978.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.89 : 1,902.84 = 653.27 : x
  2. Step 2: Convert to fraction form
    1,270.89/1,902.84 = 653.27/x
  3. Step 3: Cross multiply
    1,270.89x = 1,902.84 × 653.27
  4. Step 4: Simplify right side
    1,270.89x = 1,243,060.00
  5. Step 5: Solve for x
    x = 1,243,060.00/1,270.89
  6. Step 6: Final answer
    x = 978.10

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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.