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Finding the Fourth Proportional to 374.70, 561.18 and 328.56

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Solution

The fourth proportional to 374.70, 561.18 and 328.56 is: 492.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.70 : 561.18 = 328.56 : x
  2. Step 2: Convert to fraction form
    374.70/561.18 = 328.56/x
  3. Step 3: Cross multiply
    374.70x = 561.18 × 328.56
  4. Step 4: Simplify right side
    374.70x = 184,381.30
  5. Step 5: Solve for x
    x = 184,381.30/374.70
  6. Step 6: Final answer
    x = 492.08

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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.