Home / 3,140.07-4,710.36-831.57

Finding the Fourth Proportional to 3,140.07, 4,710.36 and 831.57

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Solution

The fourth proportional to 3,140.07, 4,710.36 and 831.57 is: 1,247.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.07 : 4,710.36 = 831.57 : x
  2. Step 2: Convert to fraction form
    3,140.07/4,710.36 = 831.57/x
  3. Step 3: Cross multiply
    3,140.07x = 4,710.36 × 831.57
  4. Step 4: Simplify right side
    3,140.07x = 3,916,994.07
  5. Step 5: Solve for x
    x = 3,916,994.07/3,140.07
  6. Step 6: Final answer
    x = 1,247.42

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1.5x scale

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.