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Finding the Fourth Proportional to 287,660.70, 431,596.25 and 133,860.03

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Solution

The fourth proportional to 287,660.70, 431,596.25 and 133,860.03 is: 200,839.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,660.70 : 431,596.25 = 133,860.03 : x
  2. Step 2: Convert to fraction form
    287,660.70/431,596.25 = 133,860.03/x
  3. Step 3: Cross multiply
    287,660.70x = 431,596.25 × 133,860.03
  4. Step 4: Simplify right side
    287,660.70x = 57,773,486,303.59
  5. Step 5: Solve for x
    x = 57,773,486,303.59/287,660.70
  6. Step 6: Final answer
    x = 200,839.00

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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.