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Finding the Fourth Proportional to 519,639.22, 779,508.54 and 145,661.14

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Solution

The fourth proportional to 519,639.22, 779,508.54 and 145,661.14 is: 218,505.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,639.22 : 779,508.54 = 145,661.14 : x
  2. Step 2: Convert to fraction form
    519,639.22/779,508.54 = 145,661.14/x
  3. Step 3: Cross multiply
    519,639.22x = 779,508.54 × 145,661.14
  4. Step 4: Simplify right side
    519,639.22x = 113,544,102,576.14
  5. Step 5: Solve for x
    x = 113,544,102,576.14/519,639.22
  6. Step 6: Final answer
    x = 218,505.64

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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.