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Finding the Fourth Proportional to 1,853.91, 2,779.47 and 620.58

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Solution

The fourth proportional to 1,853.91, 2,779.47 and 620.58 is: 930.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,853.91 : 2,779.47 = 620.58 : x
  2. Step 2: Convert to fraction form
    1,853.91/2,779.47 = 620.58/x
  3. Step 3: Cross multiply
    1,853.91x = 2,779.47 × 620.58
  4. Step 4: Simplify right side
    1,853.91x = 1,724,883.49
  5. Step 5: Solve for x
    x = 1,724,883.49/1,853.91
  6. Step 6: Final answer
    x = 930.40

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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.