Home / 1,521,130.77-2,100,582.90-978,209.37

Finding the Fourth Proportional to 1,521,130.77, 2,100,582.90 and 978,209.37

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Solution

The fourth proportional to 1,521,130.77, 2,100,582.90 and 978,209.37 is: 1,350,843.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521,130.77 : 2,100,582.90 = 978,209.37 : x
  2. Step 2: Convert to fraction form
    1,521,130.77/2,100,582.90 = 978,209.37/x
  3. Step 3: Cross multiply
    1,521,130.77x = 2,100,582.90 × 978,209.37
  4. Step 4: Simplify right side
    1,521,130.77x = 2,054,809,875,241.77
  5. Step 5: Solve for x
    x = 2,054,809,875,241.77/1,521,130.77
  6. Step 6: Final answer
    x = 1,350,843.67

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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.