Home / 1,128,080.71-1,691,279.51-678,696.29

Finding the Fourth Proportional to 1,128,080.71, 1,691,279.51 and 678,696.29

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Solution

The fourth proportional to 1,128,080.71, 1,691,279.51 and 678,696.29 is: 1,017,538.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128,080.71 : 1,691,279.51 = 678,696.29 : x
  2. Step 2: Convert to fraction form
    1,128,080.71/1,691,279.51 = 678,696.29/x
  3. Step 3: Cross multiply
    1,128,080.71x = 1,691,279.51 × 678,696.29
  4. Step 4: Simplify right side
    1,128,080.71x = 1,147,865,128,790.02
  5. Step 5: Solve for x
    x = 1,147,865,128,790.02/1,128,080.71
  6. Step 6: Final answer
    x = 1,017,538.12

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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.