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Finding the Fourth Proportional to 393,558.20, 590,337.30 and 156,937.40

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Solution

The fourth proportional to 393,558.20, 590,337.30 and 156,937.40 is: 235,406.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,558.20 : 590,337.30 = 156,937.40 : x
  2. Step 2: Convert to fraction form
    393,558.20/590,337.30 = 156,937.40/x
  3. Step 3: Cross multiply
    393,558.20x = 590,337.30 × 156,937.40
  4. Step 4: Simplify right side
    393,558.20x = 92,646,000,985.02
  5. Step 5: Solve for x
    x = 92,646,000,985.02/393,558.20
  6. Step 6: Final answer
    x = 235,406.10

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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.