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Finding the Fourth Proportional to 3,319.16, 4,978.88 and 854.08

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Solution

The fourth proportional to 3,319.16, 4,978.88 and 854.08 is: 1,281.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,319.16 : 4,978.88 = 854.08 : x
  2. Step 2: Convert to fraction form
    3,319.16/4,978.88 = 854.08/x
  3. Step 3: Cross multiply
    3,319.16x = 4,978.88 × 854.08
  4. Step 4: Simplify right side
    3,319.16x = 4,252,361.83
  5. Step 5: Solve for x
    x = 4,252,361.83/3,319.16
  6. Step 6: Final answer
    x = 1,281.16

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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.