Home / 2,990.31-4,130.16-2,394.87

Finding the Fourth Proportional to 2,990.31, 4,130.16 and 2,394.87

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Solution

The fourth proportional to 2,990.31, 4,130.16 and 2,394.87 is: 3,307.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.31 : 4,130.16 = 2,394.87 : x
  2. Step 2: Convert to fraction form
    2,990.31/4,130.16 = 2,394.87/x
  3. Step 3: Cross multiply
    2,990.31x = 4,130.16 × 2,394.87
  4. Step 4: Simplify right side
    2,990.31x = 9,891,196.28
  5. Step 5: Solve for x
    x = 9,891,196.28/2,990.31
  6. Step 6: Final answer
    x = 3,307.75

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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.