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Finding the Fourth Proportional to 351,555.84, 485,143.20 and 190,406.88

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Solution

The fourth proportional to 351,555.84, 485,143.20 and 190,406.88 is: 262,759.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,555.84 : 485,143.20 = 190,406.88 : x
  2. Step 2: Convert to fraction form
    351,555.84/485,143.20 = 190,406.88/x
  3. Step 3: Cross multiply
    351,555.84x = 485,143.20 × 190,406.88
  4. Step 4: Simplify right side
    351,555.84x = 92,374,603,065.22
  5. Step 5: Solve for x
    x = 92,374,603,065.22/351,555.84
  6. Step 6: Final answer
    x = 262,759.40

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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.