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Finding the Fourth Proportional to 667.25, 920.31 and 562.91

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Solution

The fourth proportional to 667.25, 920.31 and 562.91 is: 776.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.25 : 920.31 = 562.91 : x
  2. Step 2: Convert to fraction form
    667.25/920.31 = 562.91/x
  3. Step 3: Cross multiply
    667.25x = 920.31 × 562.91
  4. Step 4: Simplify right side
    667.25x = 518,051.70
  5. Step 5: Solve for x
    x = 518,051.70/667.25
  6. Step 6: Final answer
    x = 776.40

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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.