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Finding the Fourth Proportional to 4,890.60, 7,335.90 and 4,861.80

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Solution

The fourth proportional to 4,890.60, 7,335.90 and 4,861.80 is: 7,292.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,890.60 : 7,335.90 = 4,861.80 : x
  2. Step 2: Convert to fraction form
    4,890.60/7,335.90 = 4,861.80/x
  3. Step 3: Cross multiply
    4,890.60x = 7,335.90 × 4,861.80
  4. Step 4: Simplify right side
    4,890.60x = 35,665,678.62
  5. Step 5: Solve for x
    x = 35,665,678.62/4,890.60
  6. Step 6: Final answer
    x = 7,292.70

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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.