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Finding the Fourth Proportional to 671.93, 928.92 and 665.77

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Solution

The fourth proportional to 671.93, 928.92 and 665.77 is: 920.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.93 : 928.92 = 665.77 : x
  2. Step 2: Convert to fraction form
    671.93/928.92 = 665.77/x
  3. Step 3: Cross multiply
    671.93x = 928.92 × 665.77
  4. Step 4: Simplify right side
    671.93x = 618,444.75
  5. Step 5: Solve for x
    x = 618,444.75/671.93
  6. Step 6: Final answer
    x = 920.41

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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.