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Finding the Fourth Proportional to 1,173.35, 1,760.15 and 393.55

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Solution

The fourth proportional to 1,173.35, 1,760.15 and 393.55 is: 590.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.35 : 1,760.15 = 393.55 : x
  2. Step 2: Convert to fraction form
    1,173.35/1,760.15 = 393.55/x
  3. Step 3: Cross multiply
    1,173.35x = 1,760.15 × 393.55
  4. Step 4: Simplify right side
    1,173.35x = 692,700.66
  5. Step 5: Solve for x
    x = 692,700.66/1,173.35
  6. Step 6: Final answer
    x = 590.36

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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.