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Finding the Fourth Proportional to 564,327.36, 778,794.21 and 309,687.66

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Solution

The fourth proportional to 564,327.36, 778,794.21 and 309,687.66 is: 427,381.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,327.36 : 778,794.21 = 309,687.66 : x
  2. Step 2: Convert to fraction form
    564,327.36/778,794.21 = 309,687.66/x
  3. Step 3: Cross multiply
    564,327.36x = 778,794.21 × 309,687.66
  4. Step 4: Simplify right side
    564,327.36x = 241,182,956,516.45
  5. Step 5: Solve for x
    x = 241,182,956,516.45/564,327.36
  6. Step 6: Final answer
    x = 427,381.29

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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.