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Finding the Fourth Proportional to 671.67, 926.75 and 406.15

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Solution

The fourth proportional to 671.67, 926.75 and 406.15 is: 560.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.67 : 926.75 = 406.15 : x
  2. Step 2: Convert to fraction form
    671.67/926.75 = 406.15/x
  3. Step 3: Cross multiply
    671.67x = 926.75 × 406.15
  4. Step 4: Simplify right side
    671.67x = 376,399.51
  5. Step 5: Solve for x
    x = 376,399.51/671.67
  6. Step 6: Final answer
    x = 560.39

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Double scale
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1.5x scale

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.