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Finding the Fourth Proportional to 647.27, 970.91 and 360.53

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Solution

The fourth proportional to 647.27, 970.91 and 360.53 is: 540.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.27 : 970.91 = 360.53 : x
  2. Step 2: Convert to fraction form
    647.27/970.91 = 360.53/x
  3. Step 3: Cross multiply
    647.27x = 970.91 × 360.53
  4. Step 4: Simplify right side
    647.27x = 350,042.18
  5. Step 5: Solve for x
    x = 350,042.18/647.27
  6. Step 6: Final answer
    x = 540.80

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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.