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Finding the Fourth Proportional to 389.44, 581.55 and 340.84

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Solution

The fourth proportional to 389.44, 581.55 and 340.84 is: 508.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.44 : 581.55 = 340.84 : x
  2. Step 2: Convert to fraction form
    389.44/581.55 = 340.84/x
  3. Step 3: Cross multiply
    389.44x = 581.55 × 340.84
  4. Step 4: Simplify right side
    389.44x = 198,215.50
  5. Step 5: Solve for x
    x = 198,215.50/389.44
  6. Step 6: Final answer
    x = 508.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.