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Finding the Fourth Proportional to 368,634.32, 550,075.36 and 328,918.40

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Solution

The fourth proportional to 368,634.32, 550,075.36 and 328,918.40 is: 490,811.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,634.32 : 550,075.36 = 328,918.40 : x
  2. Step 2: Convert to fraction form
    368,634.32/550,075.36 = 328,918.40/x
  3. Step 3: Cross multiply
    368,634.32x = 550,075.36 × 328,918.40
  4. Step 4: Simplify right side
    368,634.32x = 180,929,907,290.62
  5. Step 5: Solve for x
    x = 180,929,907,290.62/368,634.32
  6. Step 6: Final answer
    x = 490,811.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.