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Finding the Fourth Proportional to 671.91, 926.40 and 435.45

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Solution

The fourth proportional to 671.91, 926.40 and 435.45 is: 600.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.91 : 926.40 = 435.45 : x
  2. Step 2: Convert to fraction form
    671.91/926.40 = 435.45/x
  3. Step 3: Cross multiply
    671.91x = 926.40 × 435.45
  4. Step 4: Simplify right side
    671.91x = 403,400.88
  5. Step 5: Solve for x
    x = 403,400.88/671.91
  6. Step 6: Final answer
    x = 600.38

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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.