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Finding the Fourth Proportional to 953.15, 1,429.76 and 259.84

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Solution

The fourth proportional to 953.15, 1,429.76 and 259.84 is: 389.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.15 : 1,429.76 = 259.84 : x
  2. Step 2: Convert to fraction form
    953.15/1,429.76 = 259.84/x
  3. Step 3: Cross multiply
    953.15x = 1,429.76 × 259.84
  4. Step 4: Simplify right side
    953.15x = 371,511.28
  5. Step 5: Solve for x
    x = 371,511.28/953.15
  6. Step 6: Final answer
    x = 389.77

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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.