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Finding the Fourth Proportional to 561.65, 842.36 and 353.32

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Solution

The fourth proportional to 561.65, 842.36 and 353.32 is: 529.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.65 : 842.36 = 353.32 : x
  2. Step 2: Convert to fraction form
    561.65/842.36 = 353.32/x
  3. Step 3: Cross multiply
    561.65x = 842.36 × 353.32
  4. Step 4: Simplify right side
    561.65x = 297,622.64
  5. Step 5: Solve for x
    x = 297,622.64/561.65
  6. Step 6: Final answer
    x = 529.91

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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.