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Finding the Fourth Proportional to 1,147.20, 1,720.80 and 599.55

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Solution

The fourth proportional to 1,147.20, 1,720.80 and 599.55 is: 899.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.20 : 1,720.80 = 599.55 : x
  2. Step 2: Convert to fraction form
    1,147.20/1,720.80 = 599.55/x
  3. Step 3: Cross multiply
    1,147.20x = 1,720.80 × 599.55
  4. Step 4: Simplify right side
    1,147.20x = 1,031,705.64
  5. Step 5: Solve for x
    x = 1,031,705.64/1,147.20
  6. Step 6: Final answer
    x = 899.33

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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.