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Finding the Fourth Proportional to 320,699.72, 481,061.82 and 143,208.20

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Solution

The fourth proportional to 320,699.72, 481,061.82 and 143,208.20 is: 214,817.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,699.72 : 481,061.82 = 143,208.20 : x
  2. Step 2: Convert to fraction form
    320,699.72/481,061.82 = 143,208.20/x
  3. Step 3: Cross multiply
    320,699.72x = 481,061.82 × 143,208.20
  4. Step 4: Simplify right side
    320,699.72x = 68,891,997,330.92
  5. Step 5: Solve for x
    x = 68,891,997,330.92/320,699.72
  6. Step 6: Final answer
    x = 214,817.77

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1.5x scale

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.