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Finding the Fourth Proportional to 1,132.99, 1,698.42 and 612.22

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Solution

The fourth proportional to 1,132.99, 1,698.42 and 612.22 is: 917.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.99 : 1,698.42 = 612.22 : x
  2. Step 2: Convert to fraction form
    1,132.99/1,698.42 = 612.22/x
  3. Step 3: Cross multiply
    1,132.99x = 1,698.42 × 612.22
  4. Step 4: Simplify right side
    1,132.99x = 1,039,795.14
  5. Step 5: Solve for x
    x = 1,039,795.14/1,132.99
  6. Step 6: Final answer
    x = 917.75

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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.