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Finding the Fourth Proportional to 1,268.57, 1,903.30 and 528.58

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Solution

The fourth proportional to 1,268.57, 1,903.30 and 528.58 is: 793.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.57 : 1,903.30 = 528.58 : x
  2. Step 2: Convert to fraction form
    1,268.57/1,903.30 = 528.58/x
  3. Step 3: Cross multiply
    1,268.57x = 1,903.30 × 528.58
  4. Step 4: Simplify right side
    1,268.57x = 1,006,040.23
  5. Step 5: Solve for x
    x = 1,006,040.23/1,268.57
  6. Step 6: Final answer
    x = 793.05

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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.