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Finding the Fourth Proportional to 290,318.87, 400,672.23 and 169,489.86

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Solution

The fourth proportional to 290,318.87, 400,672.23 and 169,489.86 is: 233,914.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,318.87 : 400,672.23 = 169,489.86 : x
  2. Step 2: Convert to fraction form
    290,318.87/400,672.23 = 169,489.86/x
  3. Step 3: Cross multiply
    290,318.87x = 400,672.23 × 169,489.86
  4. Step 4: Simplify right side
    290,318.87x = 67,909,880,168.59
  5. Step 5: Solve for x
    x = 67,909,880,168.59/290,318.87
  6. Step 6: Final answer
    x = 233,914.80

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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.