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Finding the Fourth Proportional to 437.58, 604.32 and 391.80

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Solution

The fourth proportional to 437.58, 604.32 and 391.80 is: 541.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.58 : 604.32 = 391.80 : x
  2. Step 2: Convert to fraction form
    437.58/604.32 = 391.80/x
  3. Step 3: Cross multiply
    437.58x = 604.32 × 391.80
  4. Step 4: Simplify right side
    437.58x = 236,772.58
  5. Step 5: Solve for x
    x = 236,772.58/437.58
  6. Step 6: Final answer
    x = 541.10

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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.