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Finding the Fourth Proportional to 464.23, 640.47 and 316.63

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Solution

The fourth proportional to 464.23, 640.47 and 316.63 is: 436.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.23 : 640.47 = 316.63 : x
  2. Step 2: Convert to fraction form
    464.23/640.47 = 316.63/x
  3. Step 3: Cross multiply
    464.23x = 640.47 × 316.63
  4. Step 4: Simplify right side
    464.23x = 202,792.02
  5. Step 5: Solve for x
    x = 202,792.02/464.23
  6. Step 6: Final answer
    x = 436.84

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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.