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Finding the Fourth Proportional to 1,368.98, 2,051.74 and 875.20

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Solution

The fourth proportional to 1,368.98, 2,051.74 and 875.20 is: 1,311.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.98 : 2,051.74 = 875.20 : x
  2. Step 2: Convert to fraction form
    1,368.98/2,051.74 = 875.20/x
  3. Step 3: Cross multiply
    1,368.98x = 2,051.74 × 875.20
  4. Step 4: Simplify right side
    1,368.98x = 1,795,675.53
  5. Step 5: Solve for x
    x = 1,795,675.53/1,368.98
  6. Step 6: Final answer
    x = 1,311.69

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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.