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Finding the Fourth Proportional to 555.74, 767.32 and 356.90

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Solution

The fourth proportional to 555.74, 767.32 and 356.90 is: 492.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.74 : 767.32 = 356.90 : x
  2. Step 2: Convert to fraction form
    555.74/767.32 = 356.90/x
  3. Step 3: Cross multiply
    555.74x = 767.32 × 356.90
  4. Step 4: Simplify right side
    555.74x = 273,856.51
  5. Step 5: Solve for x
    x = 273,856.51/555.74
  6. Step 6: Final answer
    x = 492.78

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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.