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Finding the Fourth Proportional to 617,940.40, 926,910.60 and 380,513.20

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Solution

The fourth proportional to 617,940.40, 926,910.60 and 380,513.20 is: 570,769.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,940.40 : 926,910.60 = 380,513.20 : x
  2. Step 2: Convert to fraction form
    617,940.40/926,910.60 = 380,513.20/x
  3. Step 3: Cross multiply
    617,940.40x = 926,910.60 × 380,513.20
  4. Step 4: Simplify right side
    617,940.40x = 352,701,718,519.92
  5. Step 5: Solve for x
    x = 352,701,718,519.92/617,940.40
  6. Step 6: Final answer
    x = 570,769.80

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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.