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Finding the Fourth Proportional to 1,334.60, 1,842.90 and 838.10

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Solution

The fourth proportional to 1,334.60, 1,842.90 and 838.10 is: 1,157.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,334.60 : 1,842.90 = 838.10 : x
  2. Step 2: Convert to fraction form
    1,334.60/1,842.90 = 838.10/x
  3. Step 3: Cross multiply
    1,334.60x = 1,842.90 × 838.10
  4. Step 4: Simplify right side
    1,334.60x = 1,544,525.28
  5. Step 5: Solve for x
    x = 1,544,525.28/1,334.60
  6. Step 6: Final answer
    x = 1,157.30

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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.