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Finding the Fourth Proportional to 374.39, 561.59 and 210.90

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Solution

The fourth proportional to 374.39, 561.59 and 210.90 is: 316.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.39 : 561.59 = 210.90 : x
  2. Step 2: Convert to fraction form
    374.39/561.59 = 210.90/x
  3. Step 3: Cross multiply
    374.39x = 561.59 × 210.90
  4. Step 4: Simplify right side
    374.39x = 118,439.86
  5. Step 5: Solve for x
    x = 118,439.86/374.39
  6. Step 6: Final answer
    x = 316.36

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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.