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Finding the Fourth Proportional to 216,643.20, 324,381.60 and 216,643.20

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Solution

The fourth proportional to 216,643.20, 324,381.60 and 216,643.20 is: 324,381.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,643.20 : 324,381.60 = 216,643.20 : x
  2. Step 2: Convert to fraction form
    216,643.20/324,381.60 = 216,643.20/x
  3. Step 3: Cross multiply
    216,643.20x = 324,381.60 × 216,643.20
  4. Step 4: Simplify right side
    216,643.20x = 70,275,067,845.12
  5. Step 5: Solve for x
    x = 70,275,067,845.12/216,643.20
  6. Step 6: Final answer
    x = 324,381.60

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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.