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Finding the Fourth Proportional to 641,708.21, 885,557.59 and 351,338.60

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Solution

The fourth proportional to 641,708.21, 885,557.59 and 351,338.60 is: 484,847.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,708.21 : 885,557.59 = 351,338.60 : x
  2. Step 2: Convert to fraction form
    641,708.21/885,557.59 = 351,338.60/x
  3. Step 3: Cross multiply
    641,708.21x = 885,557.59 × 351,338.60
  4. Step 4: Simplify right side
    641,708.21x = 311,130,558,583.84
  5. Step 5: Solve for x
    x = 311,130,558,583.84/641,708.21
  6. Step 6: Final answer
    x = 484,847.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.