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Finding the Fourth Proportional to 578.68, 867.44 and 289.51

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Solution

The fourth proportional to 578.68, 867.44 and 289.51 is: 433.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.68 : 867.44 = 289.51 : x
  2. Step 2: Convert to fraction form
    578.68/867.44 = 289.51/x
  3. Step 3: Cross multiply
    578.68x = 867.44 × 289.51
  4. Step 4: Simplify right side
    578.68x = 251,131.11
  5. Step 5: Solve for x
    x = 251,131.11/578.68
  6. Step 6: Final answer
    x = 433.97

Related Problems

Find fourth proportional to 289.34, 433.72 and 144.76
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.