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Finding the Fourth Proportional to 851.99, 1,175.70 and 479.03

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Solution

The fourth proportional to 851.99, 1,175.70 and 479.03 is: 661.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.99 : 1,175.70 = 479.03 : x
  2. Step 2: Convert to fraction form
    851.99/1,175.70 = 479.03/x
  3. Step 3: Cross multiply
    851.99x = 1,175.70 × 479.03
  4. Step 4: Simplify right side
    851.99x = 563,195.57
  5. Step 5: Solve for x
    x = 563,195.57/851.99
  6. Step 6: Final answer
    x = 661.04

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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.