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Finding the Fourth Proportional to 1,368.60, 1,898.37 and 1,321.98

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Solution

The fourth proportional to 1,368.60, 1,898.37 and 1,321.98 is: 1,833.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.60 : 1,898.37 = 1,321.98 : x
  2. Step 2: Convert to fraction form
    1,368.60/1,898.37 = 1,321.98/x
  3. Step 3: Cross multiply
    1,368.60x = 1,898.37 × 1,321.98
  4. Step 4: Simplify right side
    1,368.60x = 2,509,607.17
  5. Step 5: Solve for x
    x = 2,509,607.17/1,368.60
  6. Step 6: Final answer
    x = 1,833.70

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.