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Finding the Fourth Proportional to 1,756.54, 2,634.81 and 770.32

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Solution

The fourth proportional to 1,756.54, 2,634.81 and 770.32 is: 1,155.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,756.54 : 2,634.81 = 770.32 : x
  2. Step 2: Convert to fraction form
    1,756.54/2,634.81 = 770.32/x
  3. Step 3: Cross multiply
    1,756.54x = 2,634.81 × 770.32
  4. Step 4: Simplify right side
    1,756.54x = 2,029,646.84
  5. Step 5: Solve for x
    x = 2,029,646.84/1,756.54
  6. Step 6: Final answer
    x = 1,155.48

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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.