Home / 2,990.79-4,130.43-1,874.34

Finding the Fourth Proportional to 2,990.79, 4,130.43 and 1,874.34

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Solution

The fourth proportional to 2,990.79, 4,130.43 and 1,874.34 is: 2,588.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.79 : 4,130.43 = 1,874.34 : x
  2. Step 2: Convert to fraction form
    2,990.79/4,130.43 = 1,874.34/x
  3. Step 3: Cross multiply
    2,990.79x = 4,130.43 × 1,874.34
  4. Step 4: Simplify right side
    2,990.79x = 7,741,830.17
  5. Step 5: Solve for x
    x = 7,741,830.17/2,990.79
  6. Step 6: Final answer
    x = 2,588.56

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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.