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Finding the Fourth Proportional to 984.25, 1,476.57 and 290.93

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Solution

The fourth proportional to 984.25, 1,476.57 and 290.93 is: 436.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.25 : 1,476.57 = 290.93 : x
  2. Step 2: Convert to fraction form
    984.25/1,476.57 = 290.93/x
  3. Step 3: Cross multiply
    984.25x = 1,476.57 × 290.93
  4. Step 4: Simplify right side
    984.25x = 429,578.51
  5. Step 5: Solve for x
    x = 429,578.51/984.25
  6. Step 6: Final answer
    x = 436.45

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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.