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Finding the Fourth Proportional to 2,630.98, 3,946.48 and 782.11

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Solution

The fourth proportional to 2,630.98, 3,946.48 and 782.11 is: 1,173.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,630.98 : 3,946.48 = 782.11 : x
  2. Step 2: Convert to fraction form
    2,630.98/3,946.48 = 782.11/x
  3. Step 3: Cross multiply
    2,630.98x = 3,946.48 × 782.11
  4. Step 4: Simplify right side
    2,630.98x = 3,086,569.65
  5. Step 5: Solve for x
    x = 3,086,569.65/2,630.98
  6. Step 6: Final answer
    x = 1,173.16

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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.