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Finding the Fourth Proportional to 380,839.86, 571,308.93 and 128,011.32

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Solution

The fourth proportional to 380,839.86, 571,308.93 and 128,011.32 is: 192,033.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,839.86 : 571,308.93 = 128,011.32 : x
  2. Step 2: Convert to fraction form
    380,839.86/571,308.93 = 128,011.32/x
  3. Step 3: Cross multiply
    380,839.86x = 571,308.93 × 128,011.32
  4. Step 4: Simplify right side
    380,839.86x = 73,134,010,257.09
  5. Step 5: Solve for x
    x = 73,134,010,257.09/380,839.86
  6. Step 6: Final answer
    x = 192,033.50

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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.