Home / 4,890.30-7,335.45-1,380.30

Finding the Fourth Proportional to 4,890.30, 7,335.45 and 1,380.30

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Solution

The fourth proportional to 4,890.30, 7,335.45 and 1,380.30 is: 2,070.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,890.30 : 7,335.45 = 1,380.30 : x
  2. Step 2: Convert to fraction form
    4,890.30/7,335.45 = 1,380.30/x
  3. Step 3: Cross multiply
    4,890.30x = 7,335.45 × 1,380.30
  4. Step 4: Simplify right side
    4,890.30x = 10,125,121.64
  5. Step 5: Solve for x
    x = 10,125,121.64/4,890.30
  6. Step 6: Final answer
    x = 2,070.45

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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.