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Finding the Fourth Proportional to 647.94, 972.21 and 323.52

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Solution

The fourth proportional to 647.94, 972.21 and 323.52 is: 485.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.94 : 972.21 = 323.52 : x
  2. Step 2: Convert to fraction form
    647.94/972.21 = 323.52/x
  3. Step 3: Cross multiply
    647.94x = 972.21 × 323.52
  4. Step 4: Simplify right side
    647.94x = 314,529.38
  5. Step 5: Solve for x
    x = 314,529.38/647.94
  6. Step 6: Final answer
    x = 485.43

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Double scale
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Similar ratio
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1.5x scale

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.