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Finding the Fourth Proportional to 315,359.20, 435,205.80 and 179,389.60

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Solution

The fourth proportional to 315,359.20, 435,205.80 and 179,389.60 is: 247,563.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,359.20 : 435,205.80 = 179,389.60 : x
  2. Step 2: Convert to fraction form
    315,359.20/435,205.80 = 179,389.60/x
  3. Step 3: Cross multiply
    315,359.20x = 435,205.80 × 179,389.60
  4. Step 4: Simplify right side
    315,359.20x = 78,071,394,379.68
  5. Step 5: Solve for x
    x = 78,071,394,379.68/315,359.20
  6. Step 6: Final answer
    x = 247,563.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.