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Finding the Fourth Proportional to 405.83, 560.39 and 339.41

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Solution

The fourth proportional to 405.83, 560.39 and 339.41 is: 468.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.83 : 560.39 = 339.41 : x
  2. Step 2: Convert to fraction form
    405.83/560.39 = 339.41/x
  3. Step 3: Cross multiply
    405.83x = 560.39 × 339.41
  4. Step 4: Simplify right side
    405.83x = 190,197.47
  5. Step 5: Solve for x
    x = 190,197.47/405.83
  6. Step 6: Final answer
    x = 468.67

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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.