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Finding the Fourth Proportional to 4,776, 7,161.36 and 3,215.92

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Solution

The fourth proportional to 4,776, 7,161.36 and 3,215.92 is: 4,822.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,776 : 7,161.36 = 3,215.92 : x
  2. Step 2: Convert to fraction form
    4,776/7,161.36 = 3,215.92/x
  3. Step 3: Cross multiply
    4,776x = 7,161.36 × 3,215.92
  4. Step 4: Simplify right side
    4,776x = 23,030,360.85
  5. Step 5: Solve for x
    x = 23,030,360.85/4,776
  6. Step 6: Final answer
    x = 4,822.10

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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.