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Finding the Fourth Proportional to 618,912.16, 926,792.70 and 407,910.40

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Solution

The fourth proportional to 618,912.16, 926,792.70 and 407,910.40 is: 610,827.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,912.16 : 926,792.70 = 407,910.40 : x
  2. Step 2: Convert to fraction form
    618,912.16/926,792.70 = 407,910.40/x
  3. Step 3: Cross multiply
    618,912.16x = 926,792.70 × 407,910.40
  4. Step 4: Simplify right side
    618,912.16x = 378,048,380,974.08
  5. Step 5: Solve for x
    x = 378,048,380,974.08/618,912.16
  6. Step 6: Final answer
    x = 610,827.20

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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.