Home / 1,355,987.79-1,871,126.93-812,109.65

Finding the Fourth Proportional to 1,355,987.79, 1,871,126.93 and 812,109.65

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Solution

The fourth proportional to 1,355,987.79, 1,871,126.93 and 812,109.65 is: 1,120,629.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355,987.79 : 1,871,126.93 = 812,109.65 : x
  2. Step 2: Convert to fraction form
    1,355,987.79/1,871,126.93 = 812,109.65/x
  3. Step 3: Cross multiply
    1,355,987.79x = 1,871,126.93 × 812,109.65
  4. Step 4: Simplify right side
    1,355,987.79x = 1,519,560,228,902.51
  5. Step 5: Solve for x
    x = 1,519,560,228,902.51/1,355,987.79
  6. Step 6: Final answer
    x = 1,120,629.73

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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.