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Finding the Fourth Proportional to 611.04, 842.80 and 404.32

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Solution

The fourth proportional to 611.04, 842.80 and 404.32 is: 557.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.04 : 842.80 = 404.32 : x
  2. Step 2: Convert to fraction form
    611.04/842.80 = 404.32/x
  3. Step 3: Cross multiply
    611.04x = 842.80 × 404.32
  4. Step 4: Simplify right side
    611.04x = 340,760.90
  5. Step 5: Solve for x
    x = 340,760.90/611.04
  6. Step 6: Final answer
    x = 557.67

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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.