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Finding the Fourth Proportional to 3,225.70, 4,838.55 and 917.20

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Solution

The fourth proportional to 3,225.70, 4,838.55 and 917.20 is: 1,375.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,225.70 : 4,838.55 = 917.20 : x
  2. Step 2: Convert to fraction form
    3,225.70/4,838.55 = 917.20/x
  3. Step 3: Cross multiply
    3,225.70x = 4,838.55 × 917.20
  4. Step 4: Simplify right side
    3,225.70x = 4,437,918.06
  5. Step 5: Solve for x
    x = 4,437,918.06/3,225.70
  6. Step 6: Final answer
    x = 1,375.80

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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.