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Finding the Fourth Proportional to 1,157.13, 1,735.68 and 279.63

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Solution

The fourth proportional to 1,157.13, 1,735.68 and 279.63 is: 419.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.13 : 1,735.68 = 279.63 : x
  2. Step 2: Convert to fraction form
    1,157.13/1,735.68 = 279.63/x
  3. Step 3: Cross multiply
    1,157.13x = 1,735.68 × 279.63
  4. Step 4: Simplify right side
    1,157.13x = 485,339.52
  5. Step 5: Solve for x
    x = 485,339.52/1,157.13
  6. Step 6: Final answer
    x = 419.43

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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.