Home / 1,389,789.80-1,917,942.40-777,927.34

Finding the Fourth Proportional to 1,389,789.80, 1,917,942.40 and 777,927.34

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Solution

The fourth proportional to 1,389,789.80, 1,917,942.40 and 777,927.34 is: 1,073,557.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,789.80 : 1,917,942.40 = 777,927.34 : x
  2. Step 2: Convert to fraction form
    1,389,789.80/1,917,942.40 = 777,927.34/x
  3. Step 3: Cross multiply
    1,389,789.80x = 1,917,942.40 × 777,927.34
  4. Step 4: Simplify right side
    1,389,789.80x = 1,492,019,829,505.22
  5. Step 5: Solve for x
    x = 1,492,019,829,505.22/1,389,789.80
  6. Step 6: Final answer
    x = 1,073,557.91

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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.