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Finding the Fourth Proportional to 620.18, 930.95 and 415.19

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Solution

The fourth proportional to 620.18, 930.95 and 415.19 is: 623.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.18 : 930.95 = 415.19 : x
  2. Step 2: Convert to fraction form
    620.18/930.95 = 415.19/x
  3. Step 3: Cross multiply
    620.18x = 930.95 × 415.19
  4. Step 4: Simplify right side
    620.18x = 386,514.40
  5. Step 5: Solve for x
    x = 386,514.40/620.18
  6. Step 6: Final answer
    x = 623.23

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1.5x scale

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.