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Finding the Fourth Proportional to 290,813.55, 401,318.78 and 163,489.11

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Solution

The fourth proportional to 290,813.55, 401,318.78 and 163,489.11 is: 225,612.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,813.55 : 401,318.78 = 163,489.11 : x
  2. Step 2: Convert to fraction form
    290,813.55/401,318.78 = 163,489.11/x
  3. Step 3: Cross multiply
    290,813.55x = 401,318.78 × 163,489.11
  4. Step 4: Simplify right side
    290,813.55x = 65,611,250,168.49
  5. Step 5: Solve for x
    x = 65,611,250,168.49/290,813.55
  6. Step 6: Final answer
    x = 225,612.77

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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.