Home / 715,931.16-987,958.44-393,622.08

Finding the Fourth Proportional to 715,931.16, 987,958.44 and 393,622.08

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Solution

The fourth proportional to 715,931.16, 987,958.44 and 393,622.08 is: 543,183.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,931.16 : 987,958.44 = 393,622.08 : x
  2. Step 2: Convert to fraction form
    715,931.16/987,958.44 = 393,622.08/x
  3. Step 3: Cross multiply
    715,931.16x = 987,958.44 × 393,622.08
  4. Step 4: Simplify right side
    715,931.16x = 388,882,256,106.36
  5. Step 5: Solve for x
    x = 388,882,256,106.36/715,931.16
  6. Step 6: Final answer
    x = 543,183.87

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1.5x scale

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.