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Finding the Fourth Proportional to 213,861.60, 320,792.40 and 178,869.60

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Solution

The fourth proportional to 213,861.60, 320,792.40 and 178,869.60 is: 268,304.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,861.60 : 320,792.40 = 178,869.60 : x
  2. Step 2: Convert to fraction form
    213,861.60/320,792.40 = 178,869.60/x
  3. Step 3: Cross multiply
    213,861.60x = 320,792.40 × 178,869.60
  4. Step 4: Simplify right side
    213,861.60x = 57,380,008,271.04
  5. Step 5: Solve for x
    x = 57,380,008,271.04/213,861.60
  6. Step 6: Final answer
    x = 268,304.40

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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.