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Finding the Fourth Proportional to 647.94, 972.12 and 323.22

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Solution

The fourth proportional to 647.94, 972.12 and 323.22 is: 484.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.94 : 972.12 = 323.22 : x
  2. Step 2: Convert to fraction form
    647.94/972.12 = 323.22/x
  3. Step 3: Cross multiply
    647.94x = 972.12 × 323.22
  4. Step 4: Simplify right side
    647.94x = 314,208.63
  5. Step 5: Solve for x
    x = 314,208.63/647.94
  6. Step 6: Final answer
    x = 484.93

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Double scale
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Similar ratio
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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.