Home / 1,397.63-1,928.40-1,342.28

Finding the Fourth Proportional to 1,397.63, 1,928.40 and 1,342.28

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Solution

The fourth proportional to 1,397.63, 1,928.40 and 1,342.28 is: 1,852.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.63 : 1,928.40 = 1,342.28 : x
  2. Step 2: Convert to fraction form
    1,397.63/1,928.40 = 1,342.28/x
  3. Step 3: Cross multiply
    1,397.63x = 1,928.40 × 1,342.28
  4. Step 4: Simplify right side
    1,397.63x = 2,588,452.75
  5. Step 5: Solve for x
    x = 2,588,452.75/1,397.63
  6. Step 6: Final answer
    x = 1,852.03

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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.