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Finding the Fourth Proportional to 464.85, 640.98 and 317.57

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Solution

The fourth proportional to 464.85, 640.98 and 317.57 is: 437.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.85 : 640.98 = 317.57 : x
  2. Step 2: Convert to fraction form
    464.85/640.98 = 317.57/x
  3. Step 3: Cross multiply
    464.85x = 640.98 × 317.57
  4. Step 4: Simplify right side
    464.85x = 203,552.81
  5. Step 5: Solve for x
    x = 203,552.81/464.85
  6. Step 6: Final answer
    x = 437.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.