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Finding the Fourth Proportional to 1,780.58, 2,670.88 and 626.32

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Solution

The fourth proportional to 1,780.58, 2,670.88 and 626.32 is: 939.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.58 : 2,670.88 = 626.32 : x
  2. Step 2: Convert to fraction form
    1,780.58/2,670.88 = 626.32/x
  3. Step 3: Cross multiply
    1,780.58x = 2,670.88 × 626.32
  4. Step 4: Simplify right side
    1,780.58x = 1,672,825.56
  5. Step 5: Solve for x
    x = 1,672,825.56/1,780.58
  6. Step 6: Final answer
    x = 939.48

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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.