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Finding the Fourth Proportional to 289,380.99, 399,346.09 and 162,056.59

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Solution

The fourth proportional to 289,380.99, 399,346.09 and 162,056.59 is: 223,638.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,380.99 : 399,346.09 = 162,056.59 : x
  2. Step 2: Convert to fraction form
    289,380.99/399,346.09 = 162,056.59/x
  3. Step 3: Cross multiply
    289,380.99x = 399,346.09 × 162,056.59
  4. Step 4: Simplify right side
    289,380.99x = 64,716,663,382.25
  5. Step 5: Solve for x
    x = 64,716,663,382.25/289,380.99
  6. Step 6: Final answer
    x = 223,638.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.