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Finding the Fourth Proportional to 890.30, 1,335.44 and 274.01

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Solution

The fourth proportional to 890.30, 1,335.44 and 274.01 is: 411.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.30 : 1,335.44 = 274.01 : x
  2. Step 2: Convert to fraction form
    890.30/1,335.44 = 274.01/x
  3. Step 3: Cross multiply
    890.30x = 1,335.44 × 274.01
  4. Step 4: Simplify right side
    890.30x = 365,917.92
  5. Step 5: Solve for x
    x = 365,917.92/890.30
  6. Step 6: Final answer
    x = 411.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.