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Finding the Fourth Proportional to 561.74, 774.90 and 375.32

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Solution

The fourth proportional to 561.74, 774.90 and 375.32 is: 517.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.74 : 774.90 = 375.32 : x
  2. Step 2: Convert to fraction form
    561.74/774.90 = 375.32/x
  3. Step 3: Cross multiply
    561.74x = 774.90 × 375.32
  4. Step 4: Simplify right side
    561.74x = 290,835.47
  5. Step 5: Solve for x
    x = 290,835.47/561.74
  6. Step 6: Final answer
    x = 517.74

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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.