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Finding the Fourth Proportional to 3,108.84, 4,663.30 and 917.06

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Solution

The fourth proportional to 3,108.84, 4,663.30 and 917.06 is: 1,375.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.84 : 4,663.30 = 917.06 : x
  2. Step 2: Convert to fraction form
    3,108.84/4,663.30 = 917.06/x
  3. Step 3: Cross multiply
    3,108.84x = 4,663.30 × 917.06
  4. Step 4: Simplify right side
    3,108.84x = 4,276,525.90
  5. Step 5: Solve for x
    x = 4,276,525.90/3,108.84
  6. Step 6: Final answer
    x = 1,375.60

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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.