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Finding the Fourth Proportional to 1,268.52, 1,750.40 and 709.01

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Solution

The fourth proportional to 1,268.52, 1,750.40 and 709.01 is: 978.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.52 : 1,750.40 = 709.01 : x
  2. Step 2: Convert to fraction form
    1,268.52/1,750.40 = 709.01/x
  3. Step 3: Cross multiply
    1,268.52x = 1,750.40 × 709.01
  4. Step 4: Simplify right side
    1,268.52x = 1,241,051.10
  5. Step 5: Solve for x
    x = 1,241,051.10/1,268.52
  6. Step 6: Final answer
    x = 978.35

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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.