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Finding the Fourth Proportional to 2,090.76, 3,135.93 and 774.51

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Solution

The fourth proportional to 2,090.76, 3,135.93 and 774.51 is: 1,161.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,090.76 : 3,135.93 = 774.51 : x
  2. Step 2: Convert to fraction form
    2,090.76/3,135.93 = 774.51/x
  3. Step 3: Cross multiply
    2,090.76x = 3,135.93 × 774.51
  4. Step 4: Simplify right side
    2,090.76x = 2,428,818.11
  5. Step 5: Solve for x
    x = 2,428,818.11/2,090.76
  6. Step 6: Final answer
    x = 1,161.69

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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.