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Finding the Fourth Proportional to 641,648.55, 962,083.08 and 321,428.01

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Solution

The fourth proportional to 641,648.55, 962,083.08 and 321,428.01 is: 481,946.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,648.55 : 962,083.08 = 321,428.01 : x
  2. Step 2: Convert to fraction form
    641,648.55/962,083.08 = 321,428.01/x
  3. Step 3: Cross multiply
    641,648.55x = 962,083.08 × 321,428.01
  4. Step 4: Simplify right side
    641,648.55x = 309,240,449,859.07
  5. Step 5: Solve for x
    x = 309,240,449,859.07/641,648.55
  6. Step 6: Final answer
    x = 481,946.78

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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.