Home / 1,389,783.17-1,917,933.26-777,920.72

Finding the Fourth Proportional to 1,389,783.17, 1,917,933.26 and 777,920.72

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Solution

The fourth proportional to 1,389,783.17, 1,917,933.26 and 777,920.72 is: 1,073,548.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,783.17 : 1,917,933.26 = 777,920.72 : x
  2. Step 2: Convert to fraction form
    1,389,783.17/1,917,933.26 = 777,920.72/x
  3. Step 3: Cross multiply
    1,389,783.17x = 1,917,933.26 × 777,920.72
  4. Step 4: Simplify right side
    1,389,783.17x = 1,492,000,009,051.88
  5. Step 5: Solve for x
    x = 1,492,000,009,051.88/1,389,783.17
  6. Step 6: Final answer
    x = 1,073,548.77

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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.