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Finding the Fourth Proportional to 306,051.45, 428,821.95 and 306,051.45

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Solution

The fourth proportional to 306,051.45, 428,821.95 and 306,051.45 is: 428,821.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,051.45 : 428,821.95 = 306,051.45 : x
  2. Step 2: Convert to fraction form
    306,051.45/428,821.95 = 306,051.45/x
  3. Step 3: Cross multiply
    306,051.45x = 428,821.95 × 306,051.45
  4. Step 4: Simplify right side
    306,051.45x = 131,241,579,589.33
  5. Step 5: Solve for x
    x = 131,241,579,589.33/306,051.45
  6. Step 6: Final answer
    x = 428,821.95

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.