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Finding the Fourth Proportional to 647,091.65, 892,947.23 and 356,690.51

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Solution

The fourth proportional to 647,091.65, 892,947.23 and 356,690.51 is: 492,211.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,091.65 : 892,947.23 = 356,690.51 : x
  2. Step 2: Convert to fraction form
    647,091.65/892,947.23 = 356,690.51/x
  3. Step 3: Cross multiply
    647,091.65x = 892,947.23 × 356,690.51
  4. Step 4: Simplify right side
    647,091.65x = 318,505,802,871.79
  5. Step 5: Solve for x
    x = 318,505,802,871.79/647,091.65
  6. Step 6: Final answer
    x = 492,211.27

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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.