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Finding the Fourth Proportional to 485,840.36, 728,677.74 and 130,775.24

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Solution

The fourth proportional to 485,840.36, 728,677.74 and 130,775.24 is: 196,140.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,840.36 : 728,677.74 = 130,775.24 : x
  2. Step 2: Convert to fraction form
    485,840.36/728,677.74 = 130,775.24/x
  3. Step 3: Cross multiply
    485,840.36x = 728,677.74 × 130,775.24
  4. Step 4: Simplify right side
    485,840.36x = 95,293,006,331.16
  5. Step 5: Solve for x
    x = 95,293,006,331.16/485,840.36
  6. Step 6: Final answer
    x = 196,140.57

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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.