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Finding the Fourth Proportional to 306,044.20, 428,811.80 and 306,044.20

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Solution

The fourth proportional to 306,044.20, 428,811.80 and 306,044.20 is: 428,811.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,044.20 : 428,811.80 = 306,044.20 : x
  2. Step 2: Convert to fraction form
    306,044.20/428,811.80 = 306,044.20/x
  3. Step 3: Cross multiply
    306,044.20x = 428,811.80 × 306,044.20
  4. Step 4: Simplify right side
    306,044.20x = 131,235,364,281.56
  5. Step 5: Solve for x
    x = 131,235,364,281.56/306,044.20
  6. Step 6: Final answer
    x = 428,811.80

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1.5x scale

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.