Home / 1,315,651.68-1,971,888.28-640,721.60

Finding the Fourth Proportional to 1,315,651.68, 1,971,888.28 and 640,721.60

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Solution

The fourth proportional to 1,315,651.68, 1,971,888.28 and 640,721.60 is: 960,308.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,651.68 : 1,971,888.28 = 640,721.60 : x
  2. Step 2: Convert to fraction form
    1,315,651.68/1,971,888.28 = 640,721.60/x
  3. Step 3: Cross multiply
    1,315,651.68x = 1,971,888.28 × 640,721.60
  4. Step 4: Simplify right side
    1,315,651.68x = 1,263,431,413,782.85
  5. Step 5: Solve for x
    x = 1,263,431,413,782.85/1,315,651.68
  6. Step 6: Final answer
    x = 960,308.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.