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Finding the Fourth Proportional to 1,576.36, 2,174.52 and 978.48

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Solution

The fourth proportional to 1,576.36, 2,174.52 and 978.48 is: 1,349.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,576.36 : 2,174.52 = 978.48 : x
  2. Step 2: Convert to fraction form
    1,576.36/2,174.52 = 978.48/x
  3. Step 3: Cross multiply
    1,576.36x = 2,174.52 × 978.48
  4. Step 4: Simplify right side
    1,576.36x = 2,127,724.33
  5. Step 5: Solve for x
    x = 2,127,724.33/1,576.36
  6. Step 6: Final answer
    x = 1,349.77

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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.