Home / 2,931.25-4,396.65-1,287.81

Finding the Fourth Proportional to 2,931.25, 4,396.65 and 1,287.81

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Solution

The fourth proportional to 2,931.25, 4,396.65 and 1,287.81 is: 1,931.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.25 : 4,396.65 = 1,287.81 : x
  2. Step 2: Convert to fraction form
    2,931.25/4,396.65 = 1,287.81/x
  3. Step 3: Cross multiply
    2,931.25x = 4,396.65 × 1,287.81
  4. Step 4: Simplify right side
    2,931.25x = 5,662,043.40
  5. Step 5: Solve for x
    x = 5,662,043.40/2,931.25
  6. Step 6: Final answer
    x = 1,931.61

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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.