Home / 3,139.16-4,707.64-1,289.75

Finding the Fourth Proportional to 3,139.16, 4,707.64 and 1,289.75

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Solution

The fourth proportional to 3,139.16, 4,707.64 and 1,289.75 is: 1,934.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.16 : 4,707.64 = 1,289.75 : x
  2. Step 2: Convert to fraction form
    3,139.16/4,707.64 = 1,289.75/x
  3. Step 3: Cross multiply
    3,139.16x = 4,707.64 × 1,289.75
  4. Step 4: Simplify right side
    3,139.16x = 6,071,678.69
  5. Step 5: Solve for x
    x = 6,071,678.69/3,139.16
  6. Step 6: Final answer
    x = 1,934.17

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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.