Home / 1,954.32-2,931.50-655.80

Finding the Fourth Proportional to 1,954.32, 2,931.50 and 655.80

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Solution

The fourth proportional to 1,954.32, 2,931.50 and 655.80 is: 983.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,954.32 : 2,931.50 = 655.80 : x
  2. Step 2: Convert to fraction form
    1,954.32/2,931.50 = 655.80/x
  3. Step 3: Cross multiply
    1,954.32x = 2,931.50 × 655.80
  4. Step 4: Simplify right side
    1,954.32x = 1,922,477.70
  5. Step 5: Solve for x
    x = 1,922,477.70/1,954.32
  6. Step 6: Final answer
    x = 983.71

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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.