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Finding the Fourth Proportional to 2,756.48, 4,134.96 and 782.13

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Solution

The fourth proportional to 2,756.48, 4,134.96 and 782.13 is: 1,173.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,756.48 : 4,134.96 = 782.13 : x
  2. Step 2: Convert to fraction form
    2,756.48/4,134.96 = 782.13/x
  3. Step 3: Cross multiply
    2,756.48x = 4,134.96 × 782.13
  4. Step 4: Simplify right side
    2,756.48x = 3,234,076.26
  5. Step 5: Solve for x
    x = 3,234,076.26/2,756.48
  6. Step 6: Final answer
    x = 1,173.26

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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.