Home / 1,290,428.35-1,780,698.68-709,692.37

Finding the Fourth Proportional to 1,290,428.35, 1,780,698.68 and 709,692.37

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Solution

The fourth proportional to 1,290,428.35, 1,780,698.68 and 709,692.37 is: 979,324.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,428.35 : 1,780,698.68 = 709,692.37 : x
  2. Step 2: Convert to fraction form
    1,290,428.35/1,780,698.68 = 709,692.37/x
  3. Step 3: Cross multiply
    1,290,428.35x = 1,780,698.68 × 709,692.37
  4. Step 4: Simplify right side
    1,290,428.35x = 1,263,748,266,465.07
  5. Step 5: Solve for x
    x = 1,263,748,266,465.07/1,290,428.35
  6. Step 6: Final answer
    x = 979,324.63

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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.