Home / 2,990.40-4,483.68-1,258.56

Finding the Fourth Proportional to 2,990.40, 4,483.68 and 1,258.56

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Solution

The fourth proportional to 2,990.40, 4,483.68 and 1,258.56 is: 1,887.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.40 : 4,483.68 = 1,258.56 : x
  2. Step 2: Convert to fraction form
    2,990.40/4,483.68 = 1,258.56/x
  3. Step 3: Cross multiply
    2,990.40x = 4,483.68 × 1,258.56
  4. Step 4: Simplify right side
    2,990.40x = 5,642,980.30
  5. Step 5: Solve for x
    x = 5,642,980.30/2,990.40
  6. Step 6: Final answer
    x = 1,887.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.