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Finding the Fourth Proportional to 393,347.22, 589,858.17 and 123,385.31

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Solution

The fourth proportional to 393,347.22, 589,858.17 and 123,385.31 is: 185,026.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,347.22 : 589,858.17 = 123,385.31 : x
  2. Step 2: Convert to fraction form
    393,347.22/589,858.17 = 123,385.31/x
  3. Step 3: Cross multiply
    393,347.22x = 589,858.17 × 123,385.31
  4. Step 4: Simplify right side
    393,347.22x = 72,779,831,961.47
  5. Step 5: Solve for x
    x = 72,779,831,961.47/393,347.22
  6. Step 6: Final answer
    x = 185,026.94

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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.