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Finding the Fourth Proportional to 210,783.83, 290,888.60 and 115,290.51

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Solution

The fourth proportional to 210,783.83, 290,888.60 and 115,290.51 is: 159,104.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,783.83 : 290,888.60 = 115,290.51 : x
  2. Step 2: Convert to fraction form
    210,783.83/290,888.60 = 115,290.51/x
  3. Step 3: Cross multiply
    210,783.83x = 290,888.60 × 115,290.51
  4. Step 4: Simplify right side
    210,783.83x = 33,536,694,470.73
  5. Step 5: Solve for x
    x = 33,536,694,470.73/210,783.83
  6. Step 6: Final answer
    x = 159,104.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.