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Finding the Fourth Proportional to 1,237.72, 1,855.54 and 620.68

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Solution

The fourth proportional to 1,237.72, 1,855.54 and 620.68 is: 930.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.72 : 1,855.54 = 620.68 : x
  2. Step 2: Convert to fraction form
    1,237.72/1,855.54 = 620.68/x
  3. Step 3: Cross multiply
    1,237.72x = 1,855.54 × 620.68
  4. Step 4: Simplify right side
    1,237.72x = 1,151,696.57
  5. Step 5: Solve for x
    x = 1,151,696.57/1,237.72
  6. Step 6: Final answer
    x = 930.50

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1.5x scale

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.