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Finding the Fourth Proportional to 645,857.80, 968,441.10 and 271,457.80

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Solution

The fourth proportional to 645,857.80, 968,441.10 and 271,457.80 is: 407,041.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,857.80 : 968,441.10 = 271,457.80 : x
  2. Step 2: Convert to fraction form
    645,857.80/968,441.10 = 271,457.80/x
  3. Step 3: Cross multiply
    645,857.80x = 968,441.10 × 271,457.80
  4. Step 4: Simplify right side
    645,857.80x = 262,890,890,435.58
  5. Step 5: Solve for x
    x = 262,890,890,435.58/645,857.80
  6. Step 6: Final answer
    x = 407,041.44

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Double scale
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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.