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Finding the Fourth Proportional to 2,478.67, 3,711.93 and 1,177

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Solution

The fourth proportional to 2,478.67, 3,711.93 and 1,177 is: 1,762.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.67 : 3,711.93 = 1,177 : x
  2. Step 2: Convert to fraction form
    2,478.67/3,711.93 = 1,177/x
  3. Step 3: Cross multiply
    2,478.67x = 3,711.93 × 1,177
  4. Step 4: Simplify right side
    2,478.67x = 4,368,941.61
  5. Step 5: Solve for x
    x = 4,368,941.61/2,478.67
  6. Step 6: Final answer
    x = 1,762.62

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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.