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Finding the Fourth Proportional to 485,427.51, 728,140.64 and 130,441.54

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Solution

The fourth proportional to 485,427.51, 728,140.64 and 130,441.54 is: 195,662.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,427.51 : 728,140.64 = 130,441.54 : x
  2. Step 2: Convert to fraction form
    485,427.51/728,140.64 = 130,441.54/x
  3. Step 3: Cross multiply
    485,427.51x = 728,140.64 × 130,441.54
  4. Step 4: Simplify right side
    485,427.51x = 94,979,783,945.63
  5. Step 5: Solve for x
    x = 94,979,783,945.63/485,427.51
  6. Step 6: Final answer
    x = 195,662.14

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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.