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Finding the Fourth Proportional to 428,473.98, 641,806.80 and 343,775.58

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Solution

The fourth proportional to 428,473.98, 641,806.80 and 343,775.58 is: 514,937.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,473.98 : 641,806.80 = 343,775.58 : x
  2. Step 2: Convert to fraction form
    428,473.98/641,806.80 = 343,775.58/x
  3. Step 3: Cross multiply
    428,473.98x = 641,806.80 × 343,775.58
  4. Step 4: Simplify right side
    428,473.98x = 220,637,504,917.94
  5. Step 5: Solve for x
    x = 220,637,504,917.94/428,473.98
  6. Step 6: Final answer
    x = 514,937.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.