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Finding the Fourth Proportional to 578.84, 867.18 and 290.48

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Solution

The fourth proportional to 578.84, 867.18 and 290.48 is: 435.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.84 : 867.18 = 290.48 : x
  2. Step 2: Convert to fraction form
    578.84/867.18 = 290.48/x
  3. Step 3: Cross multiply
    578.84x = 867.18 × 290.48
  4. Step 4: Simplify right side
    578.84x = 251,898.45
  5. Step 5: Solve for x
    x = 251,898.45/578.84
  6. Step 6: Final answer
    x = 435.18

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Double scale
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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.