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Finding the Fourth Proportional to 620.16, 930.72 and 346.48

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Solution

The fourth proportional to 620.16, 930.72 and 346.48 is: 519.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.16 : 930.72 = 346.48 : x
  2. Step 2: Convert to fraction form
    620.16/930.72 = 346.48/x
  3. Step 3: Cross multiply
    620.16x = 930.72 × 346.48
  4. Step 4: Simplify right side
    620.16x = 322,475.87
  5. Step 5: Solve for x
    x = 322,475.87/620.16
  6. Step 6: Final answer
    x = 519.99

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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.