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Finding the Fourth Proportional to 523.13, 783.32 and 440.64

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Solution

The fourth proportional to 523.13, 783.32 and 440.64 is: 659.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.13 : 783.32 = 440.64 : x
  2. Step 2: Convert to fraction form
    523.13/783.32 = 440.64/x
  3. Step 3: Cross multiply
    523.13x = 783.32 × 440.64
  4. Step 4: Simplify right side
    523.13x = 345,159.92
  5. Step 5: Solve for x
    x = 345,159.92/523.13
  6. Step 6: Final answer
    x = 659.80

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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.