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Finding the Fourth Proportional to 352,620, 528,928.92 and 127,980.14

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Solution

The fourth proportional to 352,620, 528,928.92 and 127,980.14 is: 191,969.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,620 : 528,928.92 = 127,980.14 : x
  2. Step 2: Convert to fraction form
    352,620/528,928.92 = 127,980.14/x
  3. Step 3: Cross multiply
    352,620x = 528,928.92 × 127,980.14
  4. Step 4: Simplify right side
    352,620x = 67,692,394,587.00
  5. Step 5: Solve for x
    x = 67,692,394,587.00/352,620
  6. Step 6: Final answer
    x = 191,969.81

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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.