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Finding the Fourth Proportional to 2,886.90, 4,000.65 and 2,831.53

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Solution

The fourth proportional to 2,886.90, 4,000.65 and 2,831.53 is: 3,923.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.90 : 4,000.65 = 2,831.53 : x
  2. Step 2: Convert to fraction form
    2,886.90/4,000.65 = 2,831.53/x
  3. Step 3: Cross multiply
    2,886.90x = 4,000.65 × 2,831.53
  4. Step 4: Simplify right side
    2,886.90x = 11,327,961.11
  5. Step 5: Solve for x
    x = 11,327,961.11/2,886.90
  6. Step 6: Final answer
    x = 3,923.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.