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Finding the Fourth Proportional to 253,386.60, 379,861.20 and 128,727.60

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Solution

The fourth proportional to 253,386.60, 379,861.20 and 128,727.60 is: 192,980.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,386.60 : 379,861.20 = 128,727.60 : x
  2. Step 2: Convert to fraction form
    253,386.60/379,861.20 = 128,727.60/x
  3. Step 3: Cross multiply
    253,386.60x = 379,861.20 × 128,727.60
  4. Step 4: Simplify right side
    253,386.60x = 48,898,620,609.12
  5. Step 5: Solve for x
    x = 48,898,620,609.12/253,386.60
  6. Step 6: Final answer
    x = 192,980.29

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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.