Home / 2,992.50-4,129.78-1,666.18

Finding the Fourth Proportional to 2,992.50, 4,129.78 and 1,666.18

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Solution

The fourth proportional to 2,992.50, 4,129.78 and 1,666.18 is: 2,299.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,992.50 : 4,129.78 = 1,666.18 : x
  2. Step 2: Convert to fraction form
    2,992.50/4,129.78 = 1,666.18/x
  3. Step 3: Cross multiply
    2,992.50x = 4,129.78 × 1,666.18
  4. Step 4: Simplify right side
    2,992.50x = 6,880,956.84
  5. Step 5: Solve for x
    x = 6,880,956.84/2,992.50
  6. Step 6: Final answer
    x = 2,299.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.