Home / 4,287.20-6,430.90-1,690.12

Finding the Fourth Proportional to 4,287.20, 6,430.90 and 1,690.12

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Solution

The fourth proportional to 4,287.20, 6,430.90 and 1,690.12 is: 2,535.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,287.20 : 6,430.90 = 1,690.12 : x
  2. Step 2: Convert to fraction form
    4,287.20/6,430.90 = 1,690.12/x
  3. Step 3: Cross multiply
    4,287.20x = 6,430.90 × 1,690.12
  4. Step 4: Simplify right side
    4,287.20x = 10,868,992.71
  5. Step 5: Solve for x
    x = 10,868,992.71/4,287.20
  6. Step 6: Final answer
    x = 2,535.22

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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.