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Finding the Fourth Proportional to 485,208.82, 669,590.91 and 281,380.76

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Solution

The fourth proportional to 485,208.82, 669,590.91 and 281,380.76 is: 388,307.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,208.82 : 669,590.91 = 281,380.76 : x
  2. Step 2: Convert to fraction form
    485,208.82/669,590.91 = 281,380.76/x
  3. Step 3: Cross multiply
    485,208.82x = 669,590.91 × 281,380.76
  4. Step 4: Simplify right side
    485,208.82x = 188,410,000,818.87
  5. Step 5: Solve for x
    x = 188,410,000,818.87/485,208.82
  6. Step 6: Final answer
    x = 388,307.04

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1.5x scale

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.