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Finding the Fourth Proportional to 524.80, 786.21 and 455.54

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Solution

The fourth proportional to 524.80, 786.21 and 455.54 is: 682.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.80 : 786.21 = 455.54 : x
  2. Step 2: Convert to fraction form
    524.80/786.21 = 455.54/x
  3. Step 3: Cross multiply
    524.80x = 786.21 × 455.54
  4. Step 4: Simplify right side
    524.80x = 358,150.10
  5. Step 5: Solve for x
    x = 358,150.10/524.80
  6. Step 6: Final answer
    x = 682.45

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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.