Home / 3,108.40-4,662.64-917.16

Finding the Fourth Proportional to 3,108.40, 4,662.64 and 917.16

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Solution

The fourth proportional to 3,108.40, 4,662.64 and 917.16 is: 1,375.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.40 : 4,662.64 = 917.16 : x
  2. Step 2: Convert to fraction form
    3,108.40/4,662.64 = 917.16/x
  3. Step 3: Cross multiply
    3,108.40x = 4,662.64 × 917.16
  4. Step 4: Simplify right side
    3,108.40x = 4,276,386.90
  5. Step 5: Solve for x
    x = 4,276,386.90/3,108.40
  6. Step 6: Final answer
    x = 1,375.75

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1.5x scale

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.