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Finding the Fourth Proportional to 628.36, 946.16 and 519.72

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Solution

The fourth proportional to 628.36, 946.16 and 519.72 is: 782.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.36 : 946.16 = 519.72 : x
  2. Step 2: Convert to fraction form
    628.36/946.16 = 519.72/x
  3. Step 3: Cross multiply
    628.36x = 946.16 × 519.72
  4. Step 4: Simplify right side
    628.36x = 491,738.28
  5. Step 5: Solve for x
    x = 491,738.28/628.36
  6. Step 6: Final answer
    x = 782.57

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.