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Finding the Fourth Proportional to 412.31, 569.24 and 317.60

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Solution

The fourth proportional to 412.31, 569.24 and 317.60 is: 438.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.31 : 569.24 = 317.60 : x
  2. Step 2: Convert to fraction form
    412.31/569.24 = 317.60/x
  3. Step 3: Cross multiply
    412.31x = 569.24 × 317.60
  4. Step 4: Simplify right side
    412.31x = 180,794.50
  5. Step 5: Solve for x
    x = 180,794.50/412.31
  6. Step 6: Final answer
    x = 438.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.