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Finding the Fourth Proportional to 304.95, 420.86 and 174.00

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Solution

The fourth proportional to 304.95, 420.86 and 174.00 is: 240.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.95 : 420.86 = 174.00 : x
  2. Step 2: Convert to fraction form
    304.95/420.86 = 174.00/x
  3. Step 3: Cross multiply
    304.95x = 420.86 × 174.00
  4. Step 4: Simplify right side
    304.95x = 73,227.72
  5. Step 5: Solve for x
    x = 73,227.72/304.95
  6. Step 6: Final answer
    x = 240.13

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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.