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Finding the Fourth Proportional to 578.77, 868.45 and 290.19

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Solution

The fourth proportional to 578.77, 868.45 and 290.19 is: 435.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.77 : 868.45 = 290.19 : x
  2. Step 2: Convert to fraction form
    578.77/868.45 = 290.19/x
  3. Step 3: Cross multiply
    578.77x = 868.45 × 290.19
  4. Step 4: Simplify right side
    578.77x = 252,015.51
  5. Step 5: Solve for x
    x = 252,015.51/578.77
  6. Step 6: Final answer
    x = 435.43

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.