Home / 2,931.36-4,397.39-1,287.71

Finding the Fourth Proportional to 2,931.36, 4,397.39 and 1,287.71

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Solution

The fourth proportional to 2,931.36, 4,397.39 and 1,287.71 is: 1,931.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.36 : 4,397.39 = 1,287.71 : x
  2. Step 2: Convert to fraction form
    2,931.36/4,397.39 = 1,287.71/x
  3. Step 3: Cross multiply
    2,931.36x = 4,397.39 × 1,287.71
  4. Step 4: Simplify right side
    2,931.36x = 5,662,534.65
  5. Step 5: Solve for x
    x = 5,662,534.65/2,931.36
  6. Step 6: Final answer
    x = 1,931.71

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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.