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Finding the Fourth Proportional to 620.88, 933.48 and 512.88

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Solution

The fourth proportional to 620.88, 933.48 and 512.88 is: 771.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.88 : 933.48 = 512.88 : x
  2. Step 2: Convert to fraction form
    620.88/933.48 = 512.88/x
  3. Step 3: Cross multiply
    620.88x = 933.48 × 512.88
  4. Step 4: Simplify right side
    620.88x = 478,763.22
  5. Step 5: Solve for x
    x = 478,763.22/620.88
  6. Step 6: Final answer
    x = 771.10

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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.