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Finding the Fourth Proportional to 4,691.61, 7,039.98 and 1,917.63

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Solution

The fourth proportional to 4,691.61, 7,039.98 and 1,917.63 is: 2,877.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,691.61 : 7,039.98 = 1,917.63 : x
  2. Step 2: Convert to fraction form
    4,691.61/7,039.98 = 1,917.63/x
  3. Step 3: Cross multiply
    4,691.61x = 7,039.98 × 1,917.63
  4. Step 4: Simplify right side
    4,691.61x = 13,500,076.85
  5. Step 5: Solve for x
    x = 13,500,076.85/4,691.61
  6. Step 6: Final answer
    x = 2,877.49

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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.