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Finding the Fourth Proportional to 279,220.48, 385,324.80 and 151,896.64

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Solution

The fourth proportional to 279,220.48, 385,324.80 and 151,896.64 is: 209,617.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,220.48 : 385,324.80 = 151,896.64 : x
  2. Step 2: Convert to fraction form
    279,220.48/385,324.80 = 151,896.64/x
  3. Step 3: Cross multiply
    279,220.48x = 385,324.80 × 151,896.64
  4. Step 4: Simplify right side
    279,220.48x = 58,529,542,428.67
  5. Step 5: Solve for x
    x = 58,529,542,428.67/279,220.48
  6. Step 6: Final answer
    x = 209,617.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.