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Finding the Fourth Proportional to 2,607.93, 3,911.90 and 660.13

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Solution

The fourth proportional to 2,607.93, 3,911.90 and 660.13 is: 990.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,607.93 : 3,911.90 = 660.13 : x
  2. Step 2: Convert to fraction form
    2,607.93/3,911.90 = 660.13/x
  3. Step 3: Cross multiply
    2,607.93x = 3,911.90 × 660.13
  4. Step 4: Simplify right side
    2,607.93x = 2,582,373.33
  5. Step 5: Solve for x
    x = 2,582,373.33/2,607.93
  6. Step 6: Final answer
    x = 990.20

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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.