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Finding the Fourth Proportional to 623.50, 933.80 and 379.59

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Solution

The fourth proportional to 623.50, 933.80 and 379.59 is: 568.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.50 : 933.80 = 379.59 : x
  2. Step 2: Convert to fraction form
    623.50/933.80 = 379.59/x
  3. Step 3: Cross multiply
    623.50x = 933.80 × 379.59
  4. Step 4: Simplify right side
    623.50x = 354,456.47
  5. Step 5: Solve for x
    x = 354,456.47/623.50
  6. Step 6: Final answer
    x = 568.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.