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Finding the Fourth Proportional to 455,145.90, 682,135.65 and 404,990.70

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Solution

The fourth proportional to 455,145.90, 682,135.65 and 404,990.70 is: 606,967.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,145.90 : 682,135.65 = 404,990.70 : x
  2. Step 2: Convert to fraction form
    455,145.90/682,135.65 = 404,990.70/x
  3. Step 3: Cross multiply
    455,145.90x = 682,135.65 × 404,990.70
  4. Step 4: Simplify right side
    455,145.90x = 276,258,594,388.46
  5. Step 5: Solve for x
    x = 276,258,594,388.46/455,145.90
  6. Step 6: Final answer
    x = 606,967.12

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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.