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Finding the Fourth Proportional to 262,420.20, 393,630.30 and 178,439.40

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Solution

The fourth proportional to 262,420.20, 393,630.30 and 178,439.40 is: 267,659.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,420.20 : 393,630.30 = 178,439.40 : x
  2. Step 2: Convert to fraction form
    262,420.20/393,630.30 = 178,439.40/x
  3. Step 3: Cross multiply
    262,420.20x = 393,630.30 × 178,439.40
  4. Step 4: Simplify right side
    262,420.20x = 70,239,154,553.82
  5. Step 5: Solve for x
    x = 70,239,154,553.82/262,420.20
  6. Step 6: Final answer
    x = 267,659.10

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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.