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Finding the Fourth Proportional to 4,930.80, 7,381.80 and 4,412.40

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Solution

The fourth proportional to 4,930.80, 7,381.80 and 4,412.40 is: 6,605.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,930.80 : 7,381.80 = 4,412.40 : x
  2. Step 2: Convert to fraction form
    4,930.80/7,381.80 = 4,412.40/x
  3. Step 3: Cross multiply
    4,930.80x = 7,381.80 × 4,412.40
  4. Step 4: Simplify right side
    4,930.80x = 32,571,454.32
  5. Step 5: Solve for x
    x = 32,571,454.32/4,930.80
  6. Step 6: Final answer
    x = 6,605.71

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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.