Home / 4,287.20-6,429.20-1,689.60

Finding the Fourth Proportional to 4,287.20, 6,429.20 and 1,689.60

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Solution

The fourth proportional to 4,287.20, 6,429.20 and 1,689.60 is: 2,533.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,287.20 : 6,429.20 = 1,689.60 : x
  2. Step 2: Convert to fraction form
    4,287.20/6,429.20 = 1,689.60/x
  3. Step 3: Cross multiply
    4,287.20x = 6,429.20 × 1,689.60
  4. Step 4: Simplify right side
    4,287.20x = 10,862,776.32
  5. Step 5: Solve for x
    x = 10,862,776.32/4,287.20
  6. Step 6: Final answer
    x = 2,533.77

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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.