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Finding the Fourth Proportional to 3,200.10, 4,800.15 and 891.60

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Solution

The fourth proportional to 3,200.10, 4,800.15 and 891.60 is: 1,337.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,200.10 : 4,800.15 = 891.60 : x
  2. Step 2: Convert to fraction form
    3,200.10/4,800.15 = 891.60/x
  3. Step 3: Cross multiply
    3,200.10x = 4,800.15 × 891.60
  4. Step 4: Simplify right side
    3,200.10x = 4,279,813.74
  5. Step 5: Solve for x
    x = 4,279,813.74/3,200.10
  6. Step 6: Final answer
    x = 1,337.40

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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.