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Finding the Fourth Proportional to 304.87, 420.34 and 260.53

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Solution

The fourth proportional to 304.87, 420.34 and 260.53 is: 359.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.87 : 420.34 = 260.53 : x
  2. Step 2: Convert to fraction form
    304.87/420.34 = 260.53/x
  3. Step 3: Cross multiply
    304.87x = 420.34 × 260.53
  4. Step 4: Simplify right side
    304.87x = 109,511.18
  5. Step 5: Solve for x
    x = 109,511.18/304.87
  6. Step 6: Final answer
    x = 359.21

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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.