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Finding the Fourth Proportional to 306,043.30, 428,903.50 and 306,043.30

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Solution

The fourth proportional to 306,043.30, 428,903.50 and 306,043.30 is: 428,903.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,043.30 : 428,903.50 = 306,043.30 : x
  2. Step 2: Convert to fraction form
    306,043.30/428,903.50 = 306,043.30/x
  3. Step 3: Cross multiply
    306,043.30x = 428,903.50 × 306,043.30
  4. Step 4: Simplify right side
    306,043.30x = 131,263,042,521.55
  5. Step 5: Solve for x
    x = 131,263,042,521.55/306,043.30
  6. Step 6: Final answer
    x = 428,903.50

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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.