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Finding the Fourth Proportional to 399,053,610.40, 598,281,817.20 and 217,505,783.20

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Solution

The fourth proportional to 399,053,610.40, 598,281,817.20 and 217,505,783.20 is: 326,095,922.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,053,610.40 : 598,281,817.20 = 217,505,783.20 : x
  2. Step 2: Convert to fraction form
    399,053,610.40/598,281,817.20 = 217,505,783.20/x
  3. Step 3: Cross multiply
    399,053,610.40x = 598,281,817.20 × 217,505,783.20
  4. Step 4: Simplify right side
    399,053,610.40x = 130,129,755,224,405,232
  5. Step 5: Solve for x
    x = 130,129,755,224,405,232/399,053,610.40
  6. Step 6: Final answer
    x = 326,095,922.54

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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.