Home / 2,990.80-4,487.22-1,528.72

Finding the Fourth Proportional to 2,990.80, 4,487.22 and 1,528.72

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Solution

The fourth proportional to 2,990.80, 4,487.22 and 1,528.72 is: 2,293.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.80 : 4,487.22 = 1,528.72 : x
  2. Step 2: Convert to fraction form
    2,990.80/4,487.22 = 1,528.72/x
  3. Step 3: Cross multiply
    2,990.80x = 4,487.22 × 1,528.72
  4. Step 4: Simplify right side
    2,990.80x = 6,859,702.96
  5. Step 5: Solve for x
    x = 6,859,702.96/2,990.80
  6. Step 6: Final answer
    x = 2,293.60

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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.