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Finding the Fourth Proportional to 777,404.93, 1,072,855.32 and 455,218.82

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Solution

The fourth proportional to 777,404.93, 1,072,855.32 and 455,218.82 is: 628,223.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,404.93 : 1,072,855.32 = 455,218.82 : x
  2. Step 2: Convert to fraction form
    777,404.93/1,072,855.32 = 455,218.82/x
  3. Step 3: Cross multiply
    777,404.93x = 1,072,855.32 × 455,218.82
  4. Step 4: Simplify right side
    777,404.93x = 488,383,927,436.85
  5. Step 5: Solve for x
    x = 488,383,927,436.85/777,404.93
  6. Step 6: Final answer
    x = 628,223.35

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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.