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Finding the Fourth Proportional to 868,940.60, 1,303,410.90 and 839,910.20

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Solution

The fourth proportional to 868,940.60, 1,303,410.90 and 839,910.20 is: 1,259,865.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,940.60 : 1,303,410.90 = 839,910.20 : x
  2. Step 2: Convert to fraction form
    868,940.60/1,303,410.90 = 839,910.20/x
  3. Step 3: Cross multiply
    868,940.60x = 1,303,410.90 × 839,910.20
  4. Step 4: Simplify right side
    868,940.60x = 1,094,748,109,701.18
  5. Step 5: Solve for x
    x = 1,094,748,109,701.18/868,940.60
  6. Step 6: Final answer
    x = 1,259,865.30

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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.