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Finding the Fourth Proportional to 667.04, 919.15 and 430.72

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Solution

The fourth proportional to 667.04, 919.15 and 430.72 is: 593.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.04 : 919.15 = 430.72 : x
  2. Step 2: Convert to fraction form
    667.04/919.15 = 430.72/x
  3. Step 3: Cross multiply
    667.04x = 919.15 × 430.72
  4. Step 4: Simplify right side
    667.04x = 395,892.91
  5. Step 5: Solve for x
    x = 395,892.91/667.04
  6. Step 6: Final answer
    x = 593.51

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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.