Home / 2,990.12-4,126.55-1,731.44

Finding the Fourth Proportional to 2,990.12, 4,126.55 and 1,731.44

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Solution

The fourth proportional to 2,990.12, 4,126.55 and 1,731.44 is: 2,389.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.12 : 4,126.55 = 1,731.44 : x
  2. Step 2: Convert to fraction form
    2,990.12/4,126.55 = 1,731.44/x
  3. Step 3: Cross multiply
    2,990.12x = 4,126.55 × 1,731.44
  4. Step 4: Simplify right side
    2,990.12x = 7,144,875.39
  5. Step 5: Solve for x
    x = 7,144,875.39/2,990.12
  6. Step 6: Final answer
    x = 2,389.50

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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.