Home / 1,927.42-2,657.01-1,389.22

Finding the Fourth Proportional to 1,927.42, 2,657.01 and 1,389.22

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Solution

The fourth proportional to 1,927.42, 2,657.01 and 1,389.22 is: 1,915.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,927.42 : 2,657.01 = 1,389.22 : x
  2. Step 2: Convert to fraction form
    1,927.42/2,657.01 = 1,389.22/x
  3. Step 3: Cross multiply
    1,927.42x = 2,657.01 × 1,389.22
  4. Step 4: Simplify right side
    1,927.42x = 3,691,171.43
  5. Step 5: Solve for x
    x = 3,691,171.43/1,927.42
  6. Step 6: Final answer
    x = 1,915.08

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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.