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Finding the Fourth Proportional to 401,080.20, 601,620.30 and 398,315.40

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Solution

The fourth proportional to 401,080.20, 601,620.30 and 398,315.40 is: 597,473.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,080.20 : 601,620.30 = 398,315.40 : x
  2. Step 2: Convert to fraction form
    401,080.20/601,620.30 = 398,315.40/x
  3. Step 3: Cross multiply
    401,080.20x = 601,620.30 × 398,315.40
  4. Step 4: Simplify right side
    401,080.20x = 239,634,630,442.62
  5. Step 5: Solve for x
    x = 239,634,630,442.62/401,080.20
  6. Step 6: Final answer
    x = 597,473.10

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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.