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Finding the Fourth Proportional to 3,124.76, 4,686.86 and 1,275.38

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Solution

The fourth proportional to 3,124.76, 4,686.86 and 1,275.38 is: 1,912.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,124.76 : 4,686.86 = 1,275.38 : x
  2. Step 2: Convert to fraction form
    3,124.76/4,686.86 = 1,275.38/x
  3. Step 3: Cross multiply
    3,124.76x = 4,686.86 × 1,275.38
  4. Step 4: Simplify right side
    3,124.76x = 5,977,527.51
  5. Step 5: Solve for x
    x = 5,977,527.51/3,124.76
  6. Step 6: Final answer
    x = 1,912.96

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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.