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Finding the Fourth Proportional to 490,866.88, 736,218.30 and 135,916.78

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Solution

The fourth proportional to 490,866.88, 736,218.30 and 135,916.78 is: 203,852.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,866.88 : 736,218.30 = 135,916.78 : x
  2. Step 2: Convert to fraction form
    490,866.88/736,218.30 = 135,916.78/x
  3. Step 3: Cross multiply
    490,866.88x = 736,218.30 × 135,916.78
  4. Step 4: Simplify right side
    490,866.88x = 100,064,420,713.07
  5. Step 5: Solve for x
    x = 100,064,420,713.07/490,866.88
  6. Step 6: Final answer
    x = 203,852.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.