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Finding the Fourth Proportional to 505,679.76, 758,548.78 and 190,139.40

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Solution

The fourth proportional to 505,679.76, 758,548.78 and 190,139.40 is: 285,220.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,679.76 : 758,548.78 = 190,139.40 : x
  2. Step 2: Convert to fraction form
    505,679.76/758,548.78 = 190,139.40/x
  3. Step 3: Cross multiply
    505,679.76x = 758,548.78 × 190,139.40
  4. Step 4: Simplify right side
    505,679.76x = 144,230,009,424.58
  5. Step 5: Solve for x
    x = 144,230,009,424.58/505,679.76
  6. Step 6: Final answer
    x = 285,220.06

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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.