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Finding the Fourth Proportional to 579.62, 869.12 and 287.14

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Solution

The fourth proportional to 579.62, 869.12 and 287.14 is: 430.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.62 : 869.12 = 287.14 : x
  2. Step 2: Convert to fraction form
    579.62/869.12 = 287.14/x
  3. Step 3: Cross multiply
    579.62x = 869.12 × 287.14
  4. Step 4: Simplify right side
    579.62x = 249,559.12
  5. Step 5: Solve for x
    x = 249,559.12/579.62
  6. Step 6: Final answer
    x = 430.56

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.