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Finding the Fourth Proportional to 578,213.11, 797,921.43 and 316,567.87

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Solution

The fourth proportional to 578,213.11, 797,921.43 and 316,567.87 is: 436,856.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,213.11 : 797,921.43 = 316,567.87 : x
  2. Step 2: Convert to fraction form
    578,213.11/797,921.43 = 316,567.87/x
  3. Step 3: Cross multiply
    578,213.11x = 797,921.43 × 316,567.87
  4. Step 4: Simplify right side
    578,213.11x = 252,596,283,532.85
  5. Step 5: Solve for x
    x = 252,596,283,532.85/578,213.11
  6. Step 6: Final answer
    x = 436,856.73

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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.