Home / 1,576.72-2,175.79-913.78

Finding the Fourth Proportional to 1,576.72, 2,175.79 and 913.78

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Solution

The fourth proportional to 1,576.72, 2,175.79 and 913.78 is: 1,260.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,576.72 : 2,175.79 = 913.78 : x
  2. Step 2: Convert to fraction form
    1,576.72/2,175.79 = 913.78/x
  3. Step 3: Cross multiply
    1,576.72x = 2,175.79 × 913.78
  4. Step 4: Simplify right side
    1,576.72x = 1,988,192.96
  5. Step 5: Solve for x
    x = 1,988,192.96/1,576.72
  6. Step 6: Final answer
    x = 1,260.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.