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Finding the Fourth Proportional to 1,790.65, 2,685.46 and 620.35

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Solution

The fourth proportional to 1,790.65, 2,685.46 and 620.35 is: 930.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.65 : 2,685.46 = 620.35 : x
  2. Step 2: Convert to fraction form
    1,790.65/2,685.46 = 620.35/x
  3. Step 3: Cross multiply
    1,790.65x = 2,685.46 × 620.35
  4. Step 4: Simplify right side
    1,790.65x = 1,665,925.11
  5. Step 5: Solve for x
    x = 1,665,925.11/1,790.65
  6. Step 6: Final answer
    x = 930.35

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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.