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Finding the Fourth Proportional to 971.37, 1,456.41 and 355

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Solution

The fourth proportional to 971.37, 1,456.41 and 355 is: 532.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.37 : 1,456.41 = 355 : x
  2. Step 2: Convert to fraction form
    971.37/1,456.41 = 355/x
  3. Step 3: Cross multiply
    971.37x = 1,456.41 × 355
  4. Step 4: Simplify right side
    971.37x = 517,025.55
  5. Step 5: Solve for x
    x = 517,025.55/971.37
  6. Step 6: Final answer
    x = 532.26

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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.