Home / 1,315,261.39-1,971,725.68-640,965.55

Finding the Fourth Proportional to 1,315,261.39, 1,971,725.68 and 640,965.55

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Solution

The fourth proportional to 1,315,261.39, 1,971,725.68 and 640,965.55 is: 960,879.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,261.39 : 1,971,725.68 = 640,965.55 : x
  2. Step 2: Convert to fraction form
    1,315,261.39/1,971,725.68 = 640,965.55/x
  3. Step 3: Cross multiply
    1,315,261.39x = 1,971,725.68 × 640,965.55
  4. Step 4: Simplify right side
    1,315,261.39x = 1,263,808,234,930.32
  5. Step 5: Solve for x
    x = 1,263,808,234,930.32/1,315,261.39
  6. Step 6: Final answer
    x = 960,879.90

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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.