Home / 1,290,405.24-1,780,858.98-774,178.56

Finding the Fourth Proportional to 1,290,405.24, 1,780,858.98 and 774,178.56

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Solution

The fourth proportional to 1,290,405.24, 1,780,858.98 and 774,178.56 is: 1,068,426.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,405.24 : 1,780,858.98 = 774,178.56 : x
  2. Step 2: Convert to fraction form
    1,290,405.24/1,780,858.98 = 774,178.56/x
  3. Step 3: Cross multiply
    1,290,405.24x = 1,780,858.98 × 774,178.56
  4. Step 4: Simplify right side
    1,290,405.24x = 1,378,702,840,699.47
  5. Step 5: Solve for x
    x = 1,378,702,840,699.47/1,290,405.24
  6. Step 6: Final answer
    x = 1,068,426.26

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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.