Home / 1,421.15-1,961.62-1,374.98

Finding the Fourth Proportional to 1,421.15, 1,961.62 and 1,374.98

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Solution

The fourth proportional to 1,421.15, 1,961.62 and 1,374.98 is: 1,897.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.15 : 1,961.62 = 1,374.98 : x
  2. Step 2: Convert to fraction form
    1,421.15/1,961.62 = 1,374.98/x
  3. Step 3: Cross multiply
    1,421.15x = 1,961.62 × 1,374.98
  4. Step 4: Simplify right side
    1,421.15x = 2,697,175.02
  5. Step 5: Solve for x
    x = 2,697,175.02/1,421.15
  6. Step 6: Final answer
    x = 1,897.89

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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.