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Finding the Fourth Proportional to 1,268.08, 1,903.20 and 652.24

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Solution

The fourth proportional to 1,268.08, 1,903.20 and 652.24 is: 978.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.08 : 1,903.20 = 652.24 : x
  2. Step 2: Convert to fraction form
    1,268.08/1,903.20 = 652.24/x
  3. Step 3: Cross multiply
    1,268.08x = 1,903.20 × 652.24
  4. Step 4: Simplify right side
    1,268.08x = 1,241,343.17
  5. Step 5: Solve for x
    x = 1,241,343.17/1,268.08
  6. Step 6: Final answer
    x = 978.92

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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.