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Finding the Fourth Proportional to 2,705.75, 4,058.64 and 653.75

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Solution

The fourth proportional to 2,705.75, 4,058.64 and 653.75 is: 980.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,705.75 : 4,058.64 = 653.75 : x
  2. Step 2: Convert to fraction form
    2,705.75/4,058.64 = 653.75/x
  3. Step 3: Cross multiply
    2,705.75x = 4,058.64 × 653.75
  4. Step 4: Simplify right side
    2,705.75x = 2,653,335.90
  5. Step 5: Solve for x
    x = 2,653,335.90/2,705.75
  6. Step 6: Final answer
    x = 980.63

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Double scale
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Similar ratio
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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.