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Finding the Fourth Proportional to 667.03, 920.64 and 457.63

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Solution

The fourth proportional to 667.03, 920.64 and 457.63 is: 631.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.03 : 920.64 = 457.63 : x
  2. Step 2: Convert to fraction form
    667.03/920.64 = 457.63/x
  3. Step 3: Cross multiply
    667.03x = 920.64 × 457.63
  4. Step 4: Simplify right side
    667.03x = 421,312.48
  5. Step 5: Solve for x
    x = 421,312.48/667.03
  6. Step 6: Final answer
    x = 631.62

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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.