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Finding the Fourth Proportional to 492,690.42, 680,021.61 and 320,308.32

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Solution

The fourth proportional to 492,690.42, 680,021.61 and 320,308.32 is: 442,096.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,690.42 : 680,021.61 = 320,308.32 : x
  2. Step 2: Convert to fraction form
    492,690.42/680,021.61 = 320,308.32/x
  3. Step 3: Cross multiply
    492,690.42x = 680,021.61 × 320,308.32
  4. Step 4: Simplify right side
    492,690.42x = 217,816,579,462.80
  5. Step 5: Solve for x
    x = 217,816,579,462.80/492,690.42
  6. Step 6: Final answer
    x = 442,096.23

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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.