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Finding the Fourth Proportional to 5,639.40, 8,457.03 and 1,940.58

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Solution

The fourth proportional to 5,639.40, 8,457.03 and 1,940.58 is: 2,910.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.40 : 8,457.03 = 1,940.58 : x
  2. Step 2: Convert to fraction form
    5,639.40/8,457.03 = 1,940.58/x
  3. Step 3: Cross multiply
    5,639.40x = 8,457.03 × 1,940.58
  4. Step 4: Simplify right side
    5,639.40x = 16,411,543.28
  5. Step 5: Solve for x
    x = 16,411,543.28/5,639.40
  6. Step 6: Final answer
    x = 2,910.16

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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.