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Finding the Fourth Proportional to 3,339.78, 5,009.74 and 1,877.76

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Solution

The fourth proportional to 3,339.78, 5,009.74 and 1,877.76 is: 2,816.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,339.78 : 5,009.74 = 1,877.76 : x
  2. Step 2: Convert to fraction form
    3,339.78/5,009.74 = 1,877.76/x
  3. Step 3: Cross multiply
    3,339.78x = 5,009.74 × 1,877.76
  4. Step 4: Simplify right side
    3,339.78x = 9,407,089.38
  5. Step 5: Solve for x
    x = 9,407,089.38/3,339.78
  6. Step 6: Final answer
    x = 2,816.68

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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.