Home / 1,290,696.64-1,780,883.04-781,420.48

Finding the Fourth Proportional to 1,290,696.64, 1,780,883.04 and 781,420.48

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Solution

The fourth proportional to 1,290,696.64, 1,780,883.04 and 781,420.48 is: 1,078,191.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,696.64 : 1,780,883.04 = 781,420.48 : x
  2. Step 2: Convert to fraction form
    1,290,696.64/1,780,883.04 = 781,420.48/x
  3. Step 3: Cross multiply
    1,290,696.64x = 1,780,883.04 × 781,420.48
  4. Step 4: Simplify right side
    1,290,696.64x = 1,391,618,479,940.66
  5. Step 5: Solve for x
    x = 1,391,618,479,940.66/1,290,696.64
  6. Step 6: Final answer
    x = 1,078,191.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.