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Finding the Fourth Proportional to 4,989.77, 7,484.60 and 1,911.77

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Solution

The fourth proportional to 4,989.77, 7,484.60 and 1,911.77 is: 2,867.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989.77 : 7,484.60 = 1,911.77 : x
  2. Step 2: Convert to fraction form
    4,989.77/7,484.60 = 1,911.77/x
  3. Step 3: Cross multiply
    4,989.77x = 7,484.60 × 1,911.77
  4. Step 4: Simplify right side
    4,989.77x = 14,308,833.74
  5. Step 5: Solve for x
    x = 14,308,833.74/4,989.77
  6. Step 6: Final answer
    x = 2,867.63

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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.