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Finding the Fourth Proportional to 290,512.89, 400,928.22 and 163,188.57

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Solution

The fourth proportional to 290,512.89, 400,928.22 and 163,188.57 is: 225,211.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,512.89 : 400,928.22 = 163,188.57 : x
  2. Step 2: Convert to fraction form
    290,512.89/400,928.22 = 163,188.57/x
  3. Step 3: Cross multiply
    290,512.89x = 400,928.22 × 163,188.57
  4. Step 4: Simplify right side
    290,512.89x = 65,426,902,894.45
  5. Step 5: Solve for x
    x = 65,426,902,894.45/290,512.89
  6. Step 6: Final answer
    x = 225,211.70

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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.