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Finding the Fourth Proportional to 306,039.80, 428,898.59 and 306,039.80

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Solution

The fourth proportional to 306,039.80, 428,898.59 and 306,039.80 is: 428,898.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,039.80 : 428,898.59 = 306,039.80 : x
  2. Step 2: Convert to fraction form
    306,039.80/428,898.59 = 306,039.80/x
  3. Step 3: Cross multiply
    306,039.80x = 428,898.59 × 306,039.80
  4. Step 4: Simplify right side
    306,039.80x = 131,260,038,703.88
  5. Step 5: Solve for x
    x = 131,260,038,703.88/306,039.80
  6. Step 6: Final answer
    x = 428,898.59

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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.