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Finding the Fourth Proportional to 381,289.33, 571,808.61 and 128,501.69

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Solution

The fourth proportional to 381,289.33, 571,808.61 and 128,501.69 is: 192,710.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,289.33 : 571,808.61 = 128,501.69 : x
  2. Step 2: Convert to fraction form
    381,289.33/571,808.61 = 128,501.69/x
  3. Step 3: Cross multiply
    381,289.33x = 571,808.61 × 128,501.69
  4. Step 4: Simplify right side
    381,289.33x = 73,478,374,171.07
  5. Step 5: Solve for x
    x = 73,478,374,171.07/381,289.33
  6. Step 6: Final answer
    x = 192,710.28

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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.