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Finding the Fourth Proportional to 1,147.64, 1,720.90 and 801.14

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Solution

The fourth proportional to 1,147.64, 1,720.90 and 801.14 is: 1,201.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.64 : 1,720.90 = 801.14 : x
  2. Step 2: Convert to fraction form
    1,147.64/1,720.90 = 801.14/x
  3. Step 3: Cross multiply
    1,147.64x = 1,720.90 × 801.14
  4. Step 4: Simplify right side
    1,147.64x = 1,378,681.83
  5. Step 5: Solve for x
    x = 1,378,681.83/1,147.64
  6. Step 6: Final answer
    x = 1,201.32

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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.