Home / 1,985.37-2,738.98-1,239.63

Finding the Fourth Proportional to 1,985.37, 2,738.98 and 1,239.63

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Solution

The fourth proportional to 1,985.37, 2,738.98 and 1,239.63 is: 1,710.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.37 : 2,738.98 = 1,239.63 : x
  2. Step 2: Convert to fraction form
    1,985.37/2,738.98 = 1,239.63/x
  3. Step 3: Cross multiply
    1,985.37x = 2,738.98 × 1,239.63
  4. Step 4: Simplify right side
    1,985.37x = 3,395,321.78
  5. Step 5: Solve for x
    x = 3,395,321.78/1,985.37
  6. Step 6: Final answer
    x = 1,710.17

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1.5x scale

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.