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Finding the Fourth Proportional to 247,206.40, 370,723.20 and 128,838.40

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Solution

The fourth proportional to 247,206.40, 370,723.20 and 128,838.40 is: 193,212.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,206.40 : 370,723.20 = 128,838.40 : x
  2. Step 2: Convert to fraction form
    247,206.40/370,723.20 = 128,838.40/x
  3. Step 3: Cross multiply
    247,206.40x = 370,723.20 × 128,838.40
  4. Step 4: Simplify right side
    247,206.40x = 47,763,383,930.88
  5. Step 5: Solve for x
    x = 47,763,383,930.88/247,206.40
  6. Step 6: Final answer
    x = 193,212.57

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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.