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Finding the Fourth Proportional to 617.45, 924.69 and 342.86

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Solution

The fourth proportional to 617.45, 924.69 and 342.86 is: 513.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.45 : 924.69 = 342.86 : x
  2. Step 2: Convert to fraction form
    617.45/924.69 = 342.86/x
  3. Step 3: Cross multiply
    617.45x = 924.69 × 342.86
  4. Step 4: Simplify right side
    617.45x = 317,039.21
  5. Step 5: Solve for x
    x = 317,039.21/617.45
  6. Step 6: Final answer
    x = 513.47

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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.