Home / 4,287.28-6,420.84-2,089.12

Finding the Fourth Proportional to 4,287.28, 6,420.84 and 2,089.12

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Solution

The fourth proportional to 4,287.28, 6,420.84 and 2,089.12 is: 3,128.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,287.28 : 6,420.84 = 2,089.12 : x
  2. Step 2: Convert to fraction form
    4,287.28/6,420.84 = 2,089.12/x
  3. Step 3: Cross multiply
    4,287.28x = 6,420.84 × 2,089.12
  4. Step 4: Simplify right side
    4,287.28x = 13,413,905.26
  5. Step 5: Solve for x
    x = 13,413,905.26/4,287.28
  6. Step 6: Final answer
    x = 3,128.77

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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.