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Finding the Fourth Proportional to 5,607.54, 7,721.01 and 4,809.78

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Solution

The fourth proportional to 5,607.54, 7,721.01 and 4,809.78 is: 6,622.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,607.54 : 7,721.01 = 4,809.78 : x
  2. Step 2: Convert to fraction form
    5,607.54/7,721.01 = 4,809.78/x
  3. Step 3: Cross multiply
    5,607.54x = 7,721.01 × 4,809.78
  4. Step 4: Simplify right side
    5,607.54x = 37,136,359.48
  5. Step 5: Solve for x
    x = 37,136,359.48/5,607.54
  6. Step 6: Final answer
    x = 6,622.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.