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Finding the Fourth Proportional to 348.64, 522.98 and 287.59

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Solution

The fourth proportional to 348.64, 522.98 and 287.59 is: 431.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.64 : 522.98 = 287.59 : x
  2. Step 2: Convert to fraction form
    348.64/522.98 = 287.59/x
  3. Step 3: Cross multiply
    348.64x = 522.98 × 287.59
  4. Step 4: Simplify right side
    348.64x = 150,403.82
  5. Step 5: Solve for x
    x = 150,403.82/348.64
  6. Step 6: Final answer
    x = 431.40

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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.