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Finding the Fourth Proportional to 640.16, 960.53 and 293.58

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Solution

The fourth proportional to 640.16, 960.53 and 293.58 is: 440.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.16 : 960.53 = 293.58 : x
  2. Step 2: Convert to fraction form
    640.16/960.53 = 293.58/x
  3. Step 3: Cross multiply
    640.16x = 960.53 × 293.58
  4. Step 4: Simplify right side
    640.16x = 281,990.93
  5. Step 5: Solve for x
    x = 281,990.93/640.16
  6. Step 6: Final answer
    x = 440.50

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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.