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Finding the Fourth Proportional to 247,311.20, 370,675.20 and 128,921.60

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Solution

The fourth proportional to 247,311.20, 370,675.20 and 128,921.60 is: 193,230.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,311.20 : 370,675.20 = 128,921.60 : x
  2. Step 2: Convert to fraction form
    247,311.20/370,675.20 = 128,921.60/x
  3. Step 3: Cross multiply
    247,311.20x = 370,675.20 × 128,921.60
  4. Step 4: Simplify right side
    247,311.20x = 47,788,039,864.32
  5. Step 5: Solve for x
    x = 47,788,039,864.32/247,311.20
  6. Step 6: Final answer
    x = 193,230.39

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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.