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Finding the Fourth Proportional to 303.94, 455.10 and 260.20

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Solution

The fourth proportional to 303.94, 455.10 and 260.20 is: 389.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.94 : 455.10 = 260.20 : x
  2. Step 2: Convert to fraction form
    303.94/455.10 = 260.20/x
  3. Step 3: Cross multiply
    303.94x = 455.10 × 260.20
  4. Step 4: Simplify right side
    303.94x = 118,417.02
  5. Step 5: Solve for x
    x = 118,417.02/303.94
  6. Step 6: Final answer
    x = 389.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.