Home / 2,989.79-4,125.84-1,730.90

Finding the Fourth Proportional to 2,989.79, 4,125.84 and 1,730.90

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Solution

The fourth proportional to 2,989.79, 4,125.84 and 1,730.90 is: 2,388.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.79 : 4,125.84 = 1,730.90 : x
  2. Step 2: Convert to fraction form
    2,989.79/4,125.84 = 1,730.90/x
  3. Step 3: Cross multiply
    2,989.79x = 4,125.84 × 1,730.90
  4. Step 4: Simplify right side
    2,989.79x = 7,141,411.68
  5. Step 5: Solve for x
    x = 7,141,411.68/2,989.79
  6. Step 6: Final answer
    x = 2,388.60

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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.