Home / 1,128,081.40-1,691,280.54-678,696.98

Finding the Fourth Proportional to 1,128,081.40, 1,691,280.54 and 678,696.98

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Solution

The fourth proportional to 1,128,081.40, 1,691,280.54 and 678,696.98 is: 1,017,539.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128,081.40 : 1,691,280.54 = 678,696.98 : x
  2. Step 2: Convert to fraction form
    1,128,081.40/1,691,280.54 = 678,696.98/x
  3. Step 3: Cross multiply
    1,128,081.40x = 1,691,280.54 × 678,696.98
  4. Step 4: Simplify right side
    1,128,081.40x = 1,147,866,986,374.37
  5. Step 5: Solve for x
    x = 1,147,866,986,374.37/1,128,081.40
  6. Step 6: Final answer
    x = 1,017,539.15

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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.