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Finding the Fourth Proportional to 384.68, 577.61 and 339.41

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Solution

The fourth proportional to 384.68, 577.61 and 339.41 is: 509.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.68 : 577.61 = 339.41 : x
  2. Step 2: Convert to fraction form
    384.68/577.61 = 339.41/x
  3. Step 3: Cross multiply
    384.68x = 577.61 × 339.41
  4. Step 4: Simplify right side
    384.68x = 196,046.61
  5. Step 5: Solve for x
    x = 196,046.61/384.68
  6. Step 6: Final answer
    x = 509.64

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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.