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Finding the Fourth Proportional to 524.21, 785.34 and 485.53

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Solution

The fourth proportional to 524.21, 785.34 and 485.53 is: 727.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.21 : 785.34 = 485.53 : x
  2. Step 2: Convert to fraction form
    524.21/785.34 = 485.53/x
  3. Step 3: Cross multiply
    524.21x = 785.34 × 485.53
  4. Step 4: Simplify right side
    524.21x = 381,304.17
  5. Step 5: Solve for x
    x = 381,304.17/524.21
  6. Step 6: Final answer
    x = 727.40

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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.