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Finding the Fourth Proportional to 247,313.20, 370,678.20 and 128,923.60

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Solution

The fourth proportional to 247,313.20, 370,678.20 and 128,923.60 is: 193,233.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,313.20 : 370,678.20 = 128,923.60 : x
  2. Step 2: Convert to fraction form
    247,313.20/370,678.20 = 128,923.60/x
  3. Step 3: Cross multiply
    247,313.20x = 370,678.20 × 128,923.60
  4. Step 4: Simplify right side
    247,313.20x = 47,789,167,985.52
  5. Step 5: Solve for x
    x = 47,789,167,985.52/247,313.20
  6. Step 6: Final answer
    x = 193,233.39

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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.