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Finding the Fourth Proportional to 677.16, 933.72 and 490.32

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Solution

The fourth proportional to 677.16, 933.72 and 490.32 is: 676.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.16 : 933.72 = 490.32 : x
  2. Step 2: Convert to fraction form
    677.16/933.72 = 490.32/x
  3. Step 3: Cross multiply
    677.16x = 933.72 × 490.32
  4. Step 4: Simplify right side
    677.16x = 457,821.59
  5. Step 5: Solve for x
    x = 457,821.59/677.16
  6. Step 6: Final answer
    x = 676.09

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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.