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Finding the Fourth Proportional to 333,153.40, 459,751.78 and 187,990

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Solution

The fourth proportional to 333,153.40, 459,751.78 and 187,990 is: 259,426.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    333,153.40 : 459,751.78 = 187,990 : x
  2. Step 2: Convert to fraction form
    333,153.40/459,751.78 = 187,990/x
  3. Step 3: Cross multiply
    333,153.40x = 459,751.78 × 187,990
  4. Step 4: Simplify right side
    333,153.40x = 86,428,737,122.20
  5. Step 5: Solve for x
    x = 86,428,737,122.20/333,153.40
  6. Step 6: Final answer
    x = 259,426.25

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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.