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Finding the Fourth Proportional to 524.44, 785.55 and 421.16

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Solution

The fourth proportional to 524.44, 785.55 and 421.16 is: 630.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.44 : 785.55 = 421.16 : x
  2. Step 2: Convert to fraction form
    524.44/785.55 = 421.16/x
  3. Step 3: Cross multiply
    524.44x = 785.55 × 421.16
  4. Step 4: Simplify right side
    524.44x = 330,842.24
  5. Step 5: Solve for x
    x = 330,842.24/524.44
  6. Step 6: Final answer
    x = 630.85

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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.