Home / 3,225.60-4,838.40-917.12

Finding the Fourth Proportional to 3,225.60, 4,838.40 and 917.12

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Solution

The fourth proportional to 3,225.60, 4,838.40 and 917.12 is: 1,375.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,225.60 : 4,838.40 = 917.12 : x
  2. Step 2: Convert to fraction form
    3,225.60/4,838.40 = 917.12/x
  3. Step 3: Cross multiply
    3,225.60x = 4,838.40 × 917.12
  4. Step 4: Simplify right side
    3,225.60x = 4,437,393.41
  5. Step 5: Solve for x
    x = 4,437,393.41/3,225.60
  6. Step 6: Final answer
    x = 1,375.68

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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.