Home / 1,290,405.49-1,780,859.33-774,178.81

Finding the Fourth Proportional to 1,290,405.49, 1,780,859.33 and 774,178.81

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Solution

The fourth proportional to 1,290,405.49, 1,780,859.33 and 774,178.81 is: 1,068,426.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,405.49 : 1,780,859.33 = 774,178.81 : x
  2. Step 2: Convert to fraction form
    1,290,405.49/1,780,859.33 = 774,178.81/x
  3. Step 3: Cross multiply
    1,290,405.49x = 1,780,859.33 × 774,178.81
  4. Step 4: Simplify right side
    1,290,405.49x = 1,378,703,553,005.90
  5. Step 5: Solve for x
    x = 1,378,703,553,005.90/1,290,405.49
  6. Step 6: Final answer
    x = 1,068,426.60

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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.