Home / 981,626.51-1,354,838.62-636,978.55

Finding the Fourth Proportional to 981,626.51, 1,354,838.62 and 636,978.55

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Solution

The fourth proportional to 981,626.51, 1,354,838.62 and 636,978.55 is: 879,156.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,626.51 : 1,354,838.62 = 636,978.55 : x
  2. Step 2: Convert to fraction form
    981,626.51/1,354,838.62 = 636,978.55/x
  3. Step 3: Cross multiply
    981,626.51x = 1,354,838.62 × 636,978.55
  4. Step 4: Simplify right side
    981,626.51x = 863,003,135,719.49
  5. Step 5: Solve for x
    x = 863,003,135,719.49/981,626.51
  6. Step 6: Final answer
    x = 879,156.30

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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.