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Finding the Fourth Proportional to 4,993.60, 7,490.40 and 4,920.70

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Solution

The fourth proportional to 4,993.60, 7,490.40 and 4,920.70 is: 7,381.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,993.60 : 7,490.40 = 4,920.70 : x
  2. Step 2: Convert to fraction form
    4,993.60/7,490.40 = 4,920.70/x
  3. Step 3: Cross multiply
    4,993.60x = 7,490.40 × 4,920.70
  4. Step 4: Simplify right side
    4,993.60x = 36,858,011.28
  5. Step 5: Solve for x
    x = 36,858,011.28/4,993.60
  6. Step 6: Final answer
    x = 7,381.05

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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.