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Finding the Fourth Proportional to 676.32, 933.40 and 455.74

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Solution

The fourth proportional to 676.32, 933.40 and 455.74 is: 628.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.32 : 933.40 = 455.74 : x
  2. Step 2: Convert to fraction form
    676.32/933.40 = 455.74/x
  3. Step 3: Cross multiply
    676.32x = 933.40 × 455.74
  4. Step 4: Simplify right side
    676.32x = 425,388.87
  5. Step 5: Solve for x
    x = 425,388.87/676.32
  6. Step 6: Final answer
    x = 628.98

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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.