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Finding the Fourth Proportional to 875.88, 1,310.99 and 479.99

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Solution

The fourth proportional to 875.88, 1,310.99 and 479.99 is: 718.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.88 : 1,310.99 = 479.99 : x
  2. Step 2: Convert to fraction form
    875.88/1,310.99 = 479.99/x
  3. Step 3: Cross multiply
    875.88x = 1,310.99 × 479.99
  4. Step 4: Simplify right side
    875.88x = 629,262.97
  5. Step 5: Solve for x
    x = 629,262.97/875.88
  6. Step 6: Final answer
    x = 718.44

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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.