Home / 2,989.89-4,122.84-1,870.43

Finding the Fourth Proportional to 2,989.89, 4,122.84 and 1,870.43

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Solution

The fourth proportional to 2,989.89, 4,122.84 and 1,870.43 is: 2,579.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.89 : 4,122.84 = 1,870.43 : x
  2. Step 2: Convert to fraction form
    2,989.89/4,122.84 = 1,870.43/x
  3. Step 3: Cross multiply
    2,989.89x = 4,122.84 × 1,870.43
  4. Step 4: Simplify right side
    2,989.89x = 7,711,483.62
  5. Step 5: Solve for x
    x = 7,711,483.62/2,989.89
  6. Step 6: Final answer
    x = 2,579.19

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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.