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Finding the Fourth Proportional to 393,607.20, 590,410.80 and 156,986.40

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Solution

The fourth proportional to 393,607.20, 590,410.80 and 156,986.40 is: 235,479.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,607.20 : 590,410.80 = 156,986.40 : x
  2. Step 2: Convert to fraction form
    393,607.20/590,410.80 = 156,986.40/x
  3. Step 3: Cross multiply
    393,607.20x = 590,410.80 × 156,986.40
  4. Step 4: Simplify right side
    393,607.20x = 92,686,466,013.12
  5. Step 5: Solve for x
    x = 92,686,466,013.12/393,607.20
  6. Step 6: Final answer
    x = 235,479.60

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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.