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Finding the Fourth Proportional to 656.50, 905.93 and 376.72

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Solution

The fourth proportional to 656.50, 905.93 and 376.72 is: 519.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.50 : 905.93 = 376.72 : x
  2. Step 2: Convert to fraction form
    656.50/905.93 = 376.72/x
  3. Step 3: Cross multiply
    656.50x = 905.93 × 376.72
  4. Step 4: Simplify right side
    656.50x = 341,281.95
  5. Step 5: Solve for x
    x = 341,281.95/656.50
  6. Step 6: Final answer
    x = 519.85

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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.