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Finding the Fourth Proportional to 252,940.40, 379,432.20 and 86,728.40

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Solution

The fourth proportional to 252,940.40, 379,432.20 and 86,728.40 is: 130,100.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,940.40 : 379,432.20 = 86,728.40 : x
  2. Step 2: Convert to fraction form
    252,940.40/379,432.20 = 86,728.40/x
  3. Step 3: Cross multiply
    252,940.40x = 379,432.20 × 86,728.40
  4. Step 4: Simplify right side
    252,940.40x = 32,907,547,614.48
  5. Step 5: Solve for x
    x = 32,907,547,614.48/252,940.40
  6. Step 6: Final answer
    x = 130,100.01

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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.