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Finding the Fourth Proportional to 4,259.95, 6,390.95 and 1,338.26

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Solution

The fourth proportional to 4,259.95, 6,390.95 and 1,338.26 is: 2,007.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,259.95 : 6,390.95 = 1,338.26 : x
  2. Step 2: Convert to fraction form
    4,259.95/6,390.95 = 1,338.26/x
  3. Step 3: Cross multiply
    4,259.95x = 6,390.95 × 1,338.26
  4. Step 4: Simplify right side
    4,259.95x = 8,552,724.14
  5. Step 5: Solve for x
    x = 8,552,724.14/4,259.95
  6. Step 6: Final answer
    x = 2,007.70

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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.