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Finding the Fourth Proportional to 294,622.80, 442,087.80 and 128,427.60

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Solution

The fourth proportional to 294,622.80, 442,087.80 and 128,427.60 is: 192,708.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    294,622.80 : 442,087.80 = 128,427.60 : x
  2. Step 2: Convert to fraction form
    294,622.80/442,087.80 = 128,427.60/x
  3. Step 3: Cross multiply
    294,622.80x = 442,087.80 × 128,427.60
  4. Step 4: Simplify right side
    294,622.80x = 56,776,275,143.28
  5. Step 5: Solve for x
    x = 56,776,275,143.28/294,622.80
  6. Step 6: Final answer
    x = 192,708.36

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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.