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Finding the Fourth Proportional to 480,575.15, 720,755.82 and 138,943.98

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Solution

The fourth proportional to 480,575.15, 720,755.82 and 138,943.98 is: 208,385.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,575.15 : 720,755.82 = 138,943.98 : x
  2. Step 2: Convert to fraction form
    480,575.15/720,755.82 = 138,943.98/x
  3. Step 3: Cross multiply
    480,575.15x = 720,755.82 × 138,943.98
  4. Step 4: Simplify right side
    480,575.15x = 100,144,682,238.96
  5. Step 5: Solve for x
    x = 100,144,682,238.96/480,575.15
  6. Step 6: Final answer
    x = 208,385.06

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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.