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Finding the Fourth Proportional to 879,969, 1,214,371.80 and 477,561

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Solution

The fourth proportional to 879,969, 1,214,371.80 and 477,561 is: 659,042.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,969 : 1,214,371.80 = 477,561 : x
  2. Step 2: Convert to fraction form
    879,969/1,214,371.80 = 477,561/x
  3. Step 3: Cross multiply
    879,969x = 1,214,371.80 × 477,561
  4. Step 4: Simplify right side
    879,969x = 579,936,611,179.80
  5. Step 5: Solve for x
    x = 579,936,611,179.80/879,969
  6. Step 6: Final answer
    x = 659,042.09

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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.