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Finding the Fourth Proportional to 890.68, 1,335.53 and 274.22

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Solution

The fourth proportional to 890.68, 1,335.53 and 274.22 is: 411.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.68 : 1,335.53 = 274.22 : x
  2. Step 2: Convert to fraction form
    890.68/1,335.53 = 274.22/x
  3. Step 3: Cross multiply
    890.68x = 1,335.53 × 274.22
  4. Step 4: Simplify right side
    890.68x = 366,222.36
  5. Step 5: Solve for x
    x = 366,222.36/890.68
  6. Step 6: Final answer
    x = 411.17

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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.