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Finding the Fourth Proportional to 287,756.88, 431,759.66 and 154,481.51

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Solution

The fourth proportional to 287,756.88, 431,759.66 and 154,481.51 is: 231,789.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,756.88 : 431,759.66 = 154,481.51 : x
  2. Step 2: Convert to fraction form
    287,756.88/431,759.66 = 154,481.51/x
  3. Step 3: Cross multiply
    287,756.88x = 431,759.66 × 154,481.51
  4. Step 4: Simplify right side
    287,756.88x = 66,698,881,302.68
  5. Step 5: Solve for x
    x = 66,698,881,302.68/287,756.88
  6. Step 6: Final answer
    x = 231,789.01

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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.