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Finding the Fourth Proportional to 455.87, 629.12 and 259.45

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Solution

The fourth proportional to 455.87, 629.12 and 259.45 is: 358.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.87 : 629.12 = 259.45 : x
  2. Step 2: Convert to fraction form
    455.87/629.12 = 259.45/x
  3. Step 3: Cross multiply
    455.87x = 629.12 × 259.45
  4. Step 4: Simplify right side
    455.87x = 163,225.18
  5. Step 5: Solve for x
    x = 163,225.18/455.87
  6. Step 6: Final answer
    x = 358.05

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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.