Home / 1,638.21-2,260.98-930.13

Finding the Fourth Proportional to 1,638.21, 2,260.98 and 930.13

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Solution

The fourth proportional to 1,638.21, 2,260.98 and 930.13 is: 1,283.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.21 : 2,260.98 = 930.13 : x
  2. Step 2: Convert to fraction form
    1,638.21/2,260.98 = 930.13/x
  3. Step 3: Cross multiply
    1,638.21x = 2,260.98 × 930.13
  4. Step 4: Simplify right side
    1,638.21x = 2,102,989.37
  5. Step 5: Solve for x
    x = 2,102,989.37/1,638.21
  6. Step 6: Final answer
    x = 1,283.72

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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.