Home / 687,145.36-948,066.78-445,438.12

Finding the Fourth Proportional to 687,145.36, 948,066.78 and 445,438.12

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Solution

The fourth proportional to 687,145.36, 948,066.78 and 445,438.12 is: 614,578.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,145.36 : 948,066.78 = 445,438.12 : x
  2. Step 2: Convert to fraction form
    687,145.36/948,066.78 = 445,438.12/x
  3. Step 3: Cross multiply
    687,145.36x = 948,066.78 × 445,438.12
  4. Step 4: Simplify right side
    687,145.36x = 422,305,084,117.65
  5. Step 5: Solve for x
    x = 422,305,084,117.65/687,145.36
  6. Step 6: Final answer
    x = 614,578.96

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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.