Home / 939,986.40-1,409,979.60-275,138.40

Finding the Fourth Proportional to 939,986.40, 1,409,979.60 and 275,138.40

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Solution

The fourth proportional to 939,986.40, 1,409,979.60 and 275,138.40 is: 412,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,986.40 : 1,409,979.60 = 275,138.40 : x
  2. Step 2: Convert to fraction form
    939,986.40/1,409,979.60 = 275,138.40/x
  3. Step 3: Cross multiply
    939,986.40x = 1,409,979.60 × 275,138.40
  4. Step 4: Simplify right side
    939,986.40x = 387,939,531,176.64
  5. Step 5: Solve for x
    x = 387,939,531,176.64/939,986.40
  6. Step 6: Final answer
    x = 412,707.60

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1.5x scale

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.