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Finding the Fourth Proportional to 3,318.90, 4,973.46 and 1,858.50

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Solution

The fourth proportional to 3,318.90, 4,973.46 and 1,858.50 is: 2,785.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.90 : 4,973.46 = 1,858.50 : x
  2. Step 2: Convert to fraction form
    3,318.90/4,973.46 = 1,858.50/x
  3. Step 3: Cross multiply
    3,318.90x = 4,973.46 × 1,858.50
  4. Step 4: Simplify right side
    3,318.90x = 9,243,175.41
  5. Step 5: Solve for x
    x = 9,243,175.41/3,318.90
  6. Step 6: Final answer
    x = 2,785.01

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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.