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Finding the Fourth Proportional to 306,046.70, 428,815.30 and 306,046.70

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Solution

The fourth proportional to 306,046.70, 428,815.30 and 306,046.70 is: 428,815.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,046.70 : 428,815.30 = 306,046.70 : x
  2. Step 2: Convert to fraction form
    306,046.70/428,815.30 = 306,046.70/x
  3. Step 3: Cross multiply
    306,046.70x = 428,815.30 × 306,046.70
  4. Step 4: Simplify right side
    306,046.70x = 131,237,507,474.51
  5. Step 5: Solve for x
    x = 131,237,507,474.51/306,046.70
  6. Step 6: Final answer
    x = 428,815.30

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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.