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Finding the Fourth Proportional to 674.84, 1,012.14 and 290.12

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Solution

The fourth proportional to 674.84, 1,012.14 and 290.12 is: 435.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.84 : 1,012.14 = 290.12 : x
  2. Step 2: Convert to fraction form
    674.84/1,012.14 = 290.12/x
  3. Step 3: Cross multiply
    674.84x = 1,012.14 × 290.12
  4. Step 4: Simplify right side
    674.84x = 293,642.06
  5. Step 5: Solve for x
    x = 293,642.06/674.84
  6. Step 6: Final answer
    x = 435.13

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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.