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Finding the Fourth Proportional to 948.65, 1,420.20 and 582.32

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Solution

The fourth proportional to 948.65, 1,420.20 and 582.32 is: 871.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.65 : 1,420.20 = 582.32 : x
  2. Step 2: Convert to fraction form
    948.65/1,420.20 = 582.32/x
  3. Step 3: Cross multiply
    948.65x = 1,420.20 × 582.32
  4. Step 4: Simplify right side
    948.65x = 827,014.41
  5. Step 5: Solve for x
    x = 827,014.41/948.65
  6. Step 6: Final answer
    x = 871.78

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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.