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Finding the Fourth Proportional to 647.61, 971.82 and 359.25

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Solution

The fourth proportional to 647.61, 971.82 and 359.25 is: 539.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.61 : 971.82 = 359.25 : x
  2. Step 2: Convert to fraction form
    647.61/971.82 = 359.25/x
  3. Step 3: Cross multiply
    647.61x = 971.82 × 359.25
  4. Step 4: Simplify right side
    647.61x = 349,126.34
  5. Step 5: Solve for x
    x = 349,126.34/647.61
  6. Step 6: Final answer
    x = 539.10

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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.