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Finding the Fourth Proportional to 647.48, 971.44 and 404.18

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Solution

The fourth proportional to 647.48, 971.44 and 404.18 is: 606.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.48 : 971.44 = 404.18 : x
  2. Step 2: Convert to fraction form
    647.48/971.44 = 404.18/x
  3. Step 3: Cross multiply
    647.48x = 971.44 × 404.18
  4. Step 4: Simplify right side
    647.48x = 392,636.62
  5. Step 5: Solve for x
    x = 392,636.62/647.48
  6. Step 6: Final answer
    x = 606.41

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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.