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Finding the Fourth Proportional to 216,572.77, 324,641 and 90,282.88

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Solution

The fourth proportional to 216,572.77, 324,641 and 90,282.88 is: 135,333.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,572.77 : 324,641 = 90,282.88 : x
  2. Step 2: Convert to fraction form
    216,572.77/324,641 = 90,282.88/x
  3. Step 3: Cross multiply
    216,572.77x = 324,641 × 90,282.88
  4. Step 4: Simplify right side
    216,572.77x = 29,309,524,446.08
  5. Step 5: Solve for x
    x = 29,309,524,446.08/216,572.77
  6. Step 6: Final answer
    x = 135,333.38

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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.