Home / 1,245,999.70-1,868,999.55-767,702.80

Finding the Fourth Proportional to 1,245,999.70, 1,868,999.55 and 767,702.80

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Solution

The fourth proportional to 1,245,999.70, 1,868,999.55 and 767,702.80 is: 1,151,554.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,999.70 : 1,868,999.55 = 767,702.80 : x
  2. Step 2: Convert to fraction form
    1,245,999.70/1,868,999.55 = 767,702.80/x
  3. Step 3: Cross multiply
    1,245,999.70x = 1,868,999.55 × 767,702.80
  4. Step 4: Simplify right side
    1,245,999.70x = 1,434,836,187,733.74
  5. Step 5: Solve for x
    x = 1,434,836,187,733.74/1,245,999.70
  6. Step 6: Final answer
    x = 1,151,554.20

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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.