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Finding the Fourth Proportional to 1,131.64, 1,697.70 and 482.20

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Solution

The fourth proportional to 1,131.64, 1,697.70 and 482.20 is: 723.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.64 : 1,697.70 = 482.20 : x
  2. Step 2: Convert to fraction form
    1,131.64/1,697.70 = 482.20/x
  3. Step 3: Cross multiply
    1,131.64x = 1,697.70 × 482.20
  4. Step 4: Simplify right side
    1,131.64x = 818,630.94
  5. Step 5: Solve for x
    x = 818,630.94/1,131.64
  6. Step 6: Final answer
    x = 723.40

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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.