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Finding the Fourth Proportional to 579.58, 869.15 and 189.49

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Solution

The fourth proportional to 579.58, 869.15 and 189.49 is: 284.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.58 : 869.15 = 189.49 : x
  2. Step 2: Convert to fraction form
    579.58/869.15 = 189.49/x
  3. Step 3: Cross multiply
    579.58x = 869.15 × 189.49
  4. Step 4: Simplify right side
    579.58x = 164,689.94
  5. Step 5: Solve for x
    x = 164,689.94/579.58
  6. Step 6: Final answer
    x = 284.16

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.