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Finding the Fourth Proportional to 4,990.72, 7,477.87 and 3,957.36

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Solution

The fourth proportional to 4,990.72, 7,477.87 and 3,957.36 is: 5,929.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990.72 : 7,477.87 = 3,957.36 : x
  2. Step 2: Convert to fraction form
    4,990.72/7,477.87 = 3,957.36/x
  3. Step 3: Cross multiply
    4,990.72x = 7,477.87 × 3,957.36
  4. Step 4: Simplify right side
    4,990.72x = 29,592,623.62
  5. Step 5: Solve for x
    x = 29,592,623.62/4,990.72
  6. Step 6: Final answer
    x = 5,929.53

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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.