Home / 4,242.78-6,364.87-1,320.39

Finding the Fourth Proportional to 4,242.78, 6,364.87 and 1,320.39

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Solution

The fourth proportional to 4,242.78, 6,364.87 and 1,320.39 is: 1,980.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,242.78 : 6,364.87 = 1,320.39 : x
  2. Step 2: Convert to fraction form
    4,242.78/6,364.87 = 1,320.39/x
  3. Step 3: Cross multiply
    4,242.78x = 6,364.87 × 1,320.39
  4. Step 4: Simplify right side
    4,242.78x = 8,404,107.40
  5. Step 5: Solve for x
    x = 8,404,107.40/4,242.78
  6. Step 6: Final answer
    x = 1,980.80

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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.