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Finding the Fourth Proportional to 1,268.08, 1,750.50 and 770.87

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Solution

The fourth proportional to 1,268.08, 1,750.50 and 770.87 is: 1,064.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.08 : 1,750.50 = 770.87 : x
  2. Step 2: Convert to fraction form
    1,268.08/1,750.50 = 770.87/x
  3. Step 3: Cross multiply
    1,268.08x = 1,750.50 × 770.87
  4. Step 4: Simplify right side
    1,268.08x = 1,349,412.31
  5. Step 5: Solve for x
    x = 1,349,412.31/1,268.08
  6. Step 6: Final answer
    x = 1,064.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.