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Finding the Fourth Proportional to 890.35, 1,335.75 and 274.06

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Solution

The fourth proportional to 890.35, 1,335.75 and 274.06 is: 411.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.35 : 1,335.75 = 274.06 : x
  2. Step 2: Convert to fraction form
    890.35/1,335.75 = 274.06/x
  3. Step 3: Cross multiply
    890.35x = 1,335.75 × 274.06
  4. Step 4: Simplify right side
    890.35x = 366,075.65
  5. Step 5: Solve for x
    x = 366,075.65/890.35
  6. Step 6: Final answer
    x = 411.16

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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.