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Finding the Fourth Proportional to 205,427.20, 308,140.80 and 187,056.40

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Solution

The fourth proportional to 205,427.20, 308,140.80 and 187,056.40 is: 280,584.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,427.20 : 308,140.80 = 187,056.40 : x
  2. Step 2: Convert to fraction form
    205,427.20/308,140.80 = 187,056.40/x
  3. Step 3: Cross multiply
    205,427.20x = 308,140.80 × 187,056.40
  4. Step 4: Simplify right side
    205,427.20x = 57,639,708,741.12
  5. Step 5: Solve for x
    x = 57,639,708,741.12/205,427.20
  6. Step 6: Final answer
    x = 280,584.60

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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.