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Finding the Fourth Proportional to 676.74, 933.48 and 428.07

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Solution

The fourth proportional to 676.74, 933.48 and 428.07 is: 590.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.74 : 933.48 = 428.07 : x
  2. Step 2: Convert to fraction form
    676.74/933.48 = 428.07/x
  3. Step 3: Cross multiply
    676.74x = 933.48 × 428.07
  4. Step 4: Simplify right side
    676.74x = 399,594.78
  5. Step 5: Solve for x
    x = 399,594.78/676.74
  6. Step 6: Final answer
    x = 590.47

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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.