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Finding the Fourth Proportional to 1,237.02, 1,865.36 and 1,220.55

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Solution

The fourth proportional to 1,237.02, 1,865.36 and 1,220.55 is: 1,840.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.02 : 1,865.36 = 1,220.55 : x
  2. Step 2: Convert to fraction form
    1,237.02/1,865.36 = 1,220.55/x
  3. Step 3: Cross multiply
    1,237.02x = 1,865.36 × 1,220.55
  4. Step 4: Simplify right side
    1,237.02x = 2,276,759.05
  5. Step 5: Solve for x
    x = 2,276,759.05/1,237.02
  6. Step 6: Final answer
    x = 1,840.52

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.