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Finding the Fourth Proportional to 1,374.58, 2,061.86 and 644.97

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Solution

The fourth proportional to 1,374.58, 2,061.86 and 644.97 is: 967.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.58 : 2,061.86 = 644.97 : x
  2. Step 2: Convert to fraction form
    1,374.58/2,061.86 = 644.97/x
  3. Step 3: Cross multiply
    1,374.58x = 2,061.86 × 644.97
  4. Step 4: Simplify right side
    1,374.58x = 1,329,837.84
  5. Step 5: Solve for x
    x = 1,329,837.84/1,374.58
  6. Step 6: Final answer
    x = 967.45

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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.