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Finding the Fourth Proportional to 403,486.92, 556,903.15 and 306,958.21

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Solution

The fourth proportional to 403,486.92, 556,903.15 and 306,958.21 is: 423,671.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,486.92 : 556,903.15 = 306,958.21 : x
  2. Step 2: Convert to fraction form
    403,486.92/556,903.15 = 306,958.21/x
  3. Step 3: Cross multiply
    403,486.92x = 556,903.15 × 306,958.21
  4. Step 4: Simplify right side
    403,486.92x = 170,945,991,907.71
  5. Step 5: Solve for x
    x = 170,945,991,907.71/403,486.92
  6. Step 6: Final answer
    x = 423,671.71

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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.