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Finding the Fourth Proportional to 620.57, 930.57 and 446.50

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Solution

The fourth proportional to 620.57, 930.57 and 446.50 is: 669.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.57 : 930.57 = 446.50 : x
  2. Step 2: Convert to fraction form
    620.57/930.57 = 446.50/x
  3. Step 3: Cross multiply
    620.57x = 930.57 × 446.50
  4. Step 4: Simplify right side
    620.57x = 415,499.51
  5. Step 5: Solve for x
    x = 415,499.51/620.57
  6. Step 6: Final answer
    x = 669.55

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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.