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Finding the Fourth Proportional to 480,576.15, 720,757.32 and 138,944.98

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Solution

The fourth proportional to 480,576.15, 720,757.32 and 138,944.98 is: 208,386.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,576.15 : 720,757.32 = 138,944.98 : x
  2. Step 2: Convert to fraction form
    480,576.15/720,757.32 = 138,944.98/x
  3. Step 3: Cross multiply
    480,576.15x = 720,757.32 × 138,944.98
  4. Step 4: Simplify right side
    480,576.15x = 100,145,611,412.25
  5. Step 5: Solve for x
    x = 100,145,611,412.25/480,576.15
  6. Step 6: Final answer
    x = 208,386.56

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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.