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Finding the Fourth Proportional to 464.02, 640.31 and 257.02

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Solution

The fourth proportional to 464.02, 640.31 and 257.02 is: 354.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.02 : 640.31 = 257.02 : x
  2. Step 2: Convert to fraction form
    464.02/640.31 = 257.02/x
  3. Step 3: Cross multiply
    464.02x = 640.31 × 257.02
  4. Step 4: Simplify right side
    464.02x = 164,572.48
  5. Step 5: Solve for x
    x = 164,572.48/464.02
  6. Step 6: Final answer
    x = 354.67

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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.