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Finding the Fourth Proportional to 1,132.17, 1,698.90 and 612.17

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Solution

The fourth proportional to 1,132.17, 1,698.90 and 612.17 is: 918.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.17 : 1,698.90 = 612.17 : x
  2. Step 2: Convert to fraction form
    1,132.17/1,698.90 = 612.17/x
  3. Step 3: Cross multiply
    1,132.17x = 1,698.90 × 612.17
  4. Step 4: Simplify right side
    1,132.17x = 1,040,015.61
  5. Step 5: Solve for x
    x = 1,040,015.61/1,132.17
  6. Step 6: Final answer
    x = 918.60

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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.