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Finding the Fourth Proportional to 561.18, 840.76 and 300.63

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Solution

The fourth proportional to 561.18, 840.76 and 300.63 is: 450.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.18 : 840.76 = 300.63 : x
  2. Step 2: Convert to fraction form
    561.18/840.76 = 300.63/x
  3. Step 3: Cross multiply
    561.18x = 840.76 × 300.63
  4. Step 4: Simplify right side
    561.18x = 252,757.68
  5. Step 5: Solve for x
    x = 252,757.68/561.18
  6. Step 6: Final answer
    x = 450.40

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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.