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Finding the Fourth Proportional to 2,831.79, 3,907.74 and 1,572.92

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Solution

The fourth proportional to 2,831.79, 3,907.74 and 1,572.92 is: 2,170.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.79 : 3,907.74 = 1,572.92 : x
  2. Step 2: Convert to fraction form
    2,831.79/3,907.74 = 1,572.92/x
  3. Step 3: Cross multiply
    2,831.79x = 3,907.74 × 1,572.92
  4. Step 4: Simplify right side
    2,831.79x = 6,146,562.40
  5. Step 5: Solve for x
    x = 6,146,562.40/2,831.79
  6. Step 6: Final answer
    x = 2,170.56

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1.5x scale

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.