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Finding the Fourth Proportional to 676.75, 933.55 and 455.32

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Solution

The fourth proportional to 676.75, 933.55 and 455.32 is: 628.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.75 : 933.55 = 455.32 : x
  2. Step 2: Convert to fraction form
    676.75/933.55 = 455.32/x
  3. Step 3: Cross multiply
    676.75x = 933.55 × 455.32
  4. Step 4: Simplify right side
    676.75x = 425,063.99
  5. Step 5: Solve for x
    x = 425,063.99/676.75
  6. Step 6: Final answer
    x = 628.10

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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.