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Finding the Fourth Proportional to 219,438.80, 329,129.02 and 86,283.30

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Solution

The fourth proportional to 219,438.80, 329,129.02 and 86,283.30 is: 129,413.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,438.80 : 329,129.02 = 86,283.30 : x
  2. Step 2: Convert to fraction form
    219,438.80/329,129.02 = 86,283.30/x
  3. Step 3: Cross multiply
    219,438.80x = 329,129.02 × 86,283.30
  4. Step 4: Simplify right side
    219,438.80x = 28,398,337,971.37
  5. Step 5: Solve for x
    x = 28,398,337,971.37/219,438.80
  6. Step 6: Final answer
    x = 129,413.48

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1.5x scale

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.