Home / 811,937.60-1,217,906.40-779,278.40

Finding the Fourth Proportional to 811,937.60, 1,217,906.40 and 779,278.40

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Solution

The fourth proportional to 811,937.60, 1,217,906.40 and 779,278.40 is: 1,168,917.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,937.60 : 1,217,906.40 = 779,278.40 : x
  2. Step 2: Convert to fraction form
    811,937.60/1,217,906.40 = 779,278.40/x
  3. Step 3: Cross multiply
    811,937.60x = 1,217,906.40 × 779,278.40
  4. Step 4: Simplify right side
    811,937.60x = 949,088,150,741.76
  5. Step 5: Solve for x
    x = 949,088,150,741.76/811,937.60
  6. Step 6: Final answer
    x = 1,168,917.60

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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.