Home / 2,485.28-3,430.14-1,423.28

Finding the Fourth Proportional to 2,485.28, 3,430.14 and 1,423.28

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Solution

The fourth proportional to 2,485.28, 3,430.14 and 1,423.28 is: 1,964.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485.28 : 3,430.14 = 1,423.28 : x
  2. Step 2: Convert to fraction form
    2,485.28/3,430.14 = 1,423.28/x
  3. Step 3: Cross multiply
    2,485.28x = 3,430.14 × 1,423.28
  4. Step 4: Simplify right side
    2,485.28x = 4,882,049.66
  5. Step 5: Solve for x
    x = 4,882,049.66/2,485.28
  6. Step 6: Final answer
    x = 1,964.39

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.