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Finding the Fourth Proportional to 3,090.63, 4,635.96 and 782.13

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Solution

The fourth proportional to 3,090.63, 4,635.96 and 782.13 is: 1,173.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,090.63 : 4,635.96 = 782.13 : x
  2. Step 2: Convert to fraction form
    3,090.63/4,635.96 = 782.13/x
  3. Step 3: Cross multiply
    3,090.63x = 4,635.96 × 782.13
  4. Step 4: Simplify right side
    3,090.63x = 3,625,923.39
  5. Step 5: Solve for x
    x = 3,625,923.39/3,090.63
  6. Step 6: Final answer
    x = 1,173.20

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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.