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Finding the Fourth Proportional to 523.04, 780.98 and 431.44

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Solution

The fourth proportional to 523.04, 780.98 and 431.44 is: 644.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.04 : 780.98 = 431.44 : x
  2. Step 2: Convert to fraction form
    523.04/780.98 = 431.44/x
  3. Step 3: Cross multiply
    523.04x = 780.98 × 431.44
  4. Step 4: Simplify right side
    523.04x = 336,946.01
  5. Step 5: Solve for x
    x = 336,946.01/523.04
  6. Step 6: Final answer
    x = 644.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.