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Finding the Fourth Proportional to 2,800.08, 4,200.12 and 1,259.28

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Solution

The fourth proportional to 2,800.08, 4,200.12 and 1,259.28 is: 1,888.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.08 : 4,200.12 = 1,259.28 : x
  2. Step 2: Convert to fraction form
    2,800.08/4,200.12 = 1,259.28/x
  3. Step 3: Cross multiply
    2,800.08x = 4,200.12 × 1,259.28
  4. Step 4: Simplify right side
    2,800.08x = 5,289,127.11
  5. Step 5: Solve for x
    x = 5,289,127.11/2,800.08
  6. Step 6: Final answer
    x = 1,888.92

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Similar ratio
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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.