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Finding the Fourth Proportional to 620,664.46, 930,971.40 and 215,949.32

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Solution

The fourth proportional to 620,664.46, 930,971.40 and 215,949.32 is: 323,915.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,664.46 : 930,971.40 = 215,949.32 : x
  2. Step 2: Convert to fraction form
    620,664.46/930,971.40 = 215,949.32/x
  3. Step 3: Cross multiply
    620,664.46x = 930,971.40 × 215,949.32
  4. Step 4: Simplify right side
    620,664.46x = 201,042,640,769.45
  5. Step 5: Solve for x
    x = 201,042,640,769.45/620,664.46
  6. Step 6: Final answer
    x = 323,915.18

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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.