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Finding the Fourth Proportional to 380,814.84, 571,270.86 and 127,986.84

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Solution

The fourth proportional to 380,814.84, 571,270.86 and 127,986.84 is: 191,996.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,814.84 : 571,270.86 = 127,986.84 : x
  2. Step 2: Convert to fraction form
    380,814.84/571,270.86 = 127,986.84/x
  3. Step 3: Cross multiply
    380,814.84x = 571,270.86 × 127,986.84
  4. Step 4: Simplify right side
    380,814.84x = 73,115,152,155.48
  5. Step 5: Solve for x
    x = 73,115,152,155.48/380,814.84
  6. Step 6: Final answer
    x = 191,996.59

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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.