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Finding the Fourth Proportional to 490,544.82, 676,530.33 and 318,293.10

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Solution

The fourth proportional to 490,544.82, 676,530.33 and 318,293.10 is: 438,970.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,544.82 : 676,530.33 = 318,293.10 : x
  2. Step 2: Convert to fraction form
    490,544.82/676,530.33 = 318,293.10/x
  3. Step 3: Cross multiply
    490,544.82x = 676,530.33 × 318,293.10
  4. Step 4: Simplify right side
    490,544.82x = 215,334,935,979.72
  5. Step 5: Solve for x
    x = 215,334,935,979.72/490,544.82
  6. Step 6: Final answer
    x = 438,970.97

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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.