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Finding the Fourth Proportional to 564,481.68, 778,993.92 and 309,856.56

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Solution

The fourth proportional to 564,481.68, 778,993.92 and 309,856.56 is: 427,607.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,481.68 : 778,993.92 = 309,856.56 : x
  2. Step 2: Convert to fraction form
    564,481.68/778,993.92 = 309,856.56/x
  3. Step 3: Cross multiply
    564,481.68x = 778,993.92 × 309,856.56
  4. Step 4: Simplify right side
    564,481.68x = 241,376,376,312.12
  5. Step 5: Solve for x
    x = 241,376,376,312.12/564,481.68
  6. Step 6: Final answer
    x = 427,607.10

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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.