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Finding the Fourth Proportional to 408,028.60, 612,042.90 and 171,638.20

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Solution

The fourth proportional to 408,028.60, 612,042.90 and 171,638.20 is: 257,457.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,028.60 : 612,042.90 = 171,638.20 : x
  2. Step 2: Convert to fraction form
    408,028.60/612,042.90 = 171,638.20/x
  3. Step 3: Cross multiply
    408,028.60x = 612,042.90 × 171,638.20
  4. Step 4: Simplify right side
    408,028.60x = 105,049,941,678.78
  5. Step 5: Solve for x
    x = 105,049,941,678.78/408,028.60
  6. Step 6: Final answer
    x = 257,457.30

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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.