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Finding the Fourth Proportional to 676.10, 933.12 and 490.21

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Solution

The fourth proportional to 676.10, 933.12 and 490.21 is: 676.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.10 : 933.12 = 490.21 : x
  2. Step 2: Convert to fraction form
    676.10/933.12 = 490.21/x
  3. Step 3: Cross multiply
    676.10x = 933.12 × 490.21
  4. Step 4: Simplify right side
    676.10x = 457,424.76
  5. Step 5: Solve for x
    x = 457,424.76/676.10
  6. Step 6: Final answer
    x = 676.56

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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.