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Finding the Fourth Proportional to 2,755.17, 4,130.88 and 905.61

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Solution

The fourth proportional to 2,755.17, 4,130.88 and 905.61 is: 1,357.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,755.17 : 4,130.88 = 905.61 : x
  2. Step 2: Convert to fraction form
    2,755.17/4,130.88 = 905.61/x
  3. Step 3: Cross multiply
    2,755.17x = 4,130.88 × 905.61
  4. Step 4: Simplify right side
    2,755.17x = 3,740,966.24
  5. Step 5: Solve for x
    x = 3,740,966.24/2,755.17
  6. Step 6: Final answer
    x = 1,357.80

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1.5x scale

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.