Home / 1,431.46-2,145.30-651.57

Finding the Fourth Proportional to 1,431.46, 2,145.30 and 651.57

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Solution

The fourth proportional to 1,431.46, 2,145.30 and 651.57 is: 976.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.46 : 2,145.30 = 651.57 : x
  2. Step 2: Convert to fraction form
    1,431.46/2,145.30 = 651.57/x
  3. Step 3: Cross multiply
    1,431.46x = 2,145.30 × 651.57
  4. Step 4: Simplify right side
    1,431.46x = 1,397,813.12
  5. Step 5: Solve for x
    x = 1,397,813.12/1,431.46
  6. Step 6: Final answer
    x = 976.49

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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.