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Finding the Fourth Proportional to 3,179.48, 4,769.83 and 988.13

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Solution

The fourth proportional to 3,179.48, 4,769.83 and 988.13 is: 1,482.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,179.48 : 4,769.83 = 988.13 : x
  2. Step 2: Convert to fraction form
    3,179.48/4,769.83 = 988.13/x
  3. Step 3: Cross multiply
    3,179.48x = 4,769.83 × 988.13
  4. Step 4: Simplify right side
    3,179.48x = 4,713,188.27
  5. Step 5: Solve for x
    x = 4,713,188.27/3,179.48
  6. Step 6: Final answer
    x = 1,482.38

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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.