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Finding the Fourth Proportional to 423.58, 583.75 and 305.35

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Solution

The fourth proportional to 423.58, 583.75 and 305.35 is: 420.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.58 : 583.75 = 305.35 : x
  2. Step 2: Convert to fraction form
    423.58/583.75 = 305.35/x
  3. Step 3: Cross multiply
    423.58x = 583.75 × 305.35
  4. Step 4: Simplify right side
    423.58x = 178,249.17
  5. Step 5: Solve for x
    x = 178,249.17/423.58
  6. Step 6: Final answer
    x = 420.81

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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.