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Finding the Fourth Proportional to 270,485.60, 405,976.40 and 137,458.40

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Solution

The fourth proportional to 270,485.60, 405,976.40 and 137,458.40 is: 206,313.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,485.60 : 405,976.40 = 137,458.40 : x
  2. Step 2: Convert to fraction form
    270,485.60/405,976.40 = 137,458.40/x
  3. Step 3: Cross multiply
    270,485.60x = 405,976.40 × 137,458.40
  4. Step 4: Simplify right side
    270,485.60x = 55,804,866,381.76
  5. Step 5: Solve for x
    x = 55,804,866,381.76/270,485.60
  6. Step 6: Final answer
    x = 206,313.63

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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.