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Finding the Fourth Proportional to 4,762.68, 7,138.54 and 3,200.80

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Solution

The fourth proportional to 4,762.68, 7,138.54 and 3,200.80 is: 4,797.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,762.68 : 7,138.54 = 3,200.80 : x
  2. Step 2: Convert to fraction form
    4,762.68/7,138.54 = 3,200.80/x
  3. Step 3: Cross multiply
    4,762.68x = 7,138.54 × 3,200.80
  4. Step 4: Simplify right side
    4,762.68x = 22,849,038.83
  5. Step 5: Solve for x
    x = 22,849,038.83/4,762.68
  6. Step 6: Final answer
    x = 4,797.52

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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.