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Finding the Fourth Proportional to 640,709.28, 884,209.68 and 354,224.16

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Solution

The fourth proportional to 640,709.28, 884,209.68 and 354,224.16 is: 488,846.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,709.28 : 884,209.68 = 354,224.16 : x
  2. Step 2: Convert to fraction form
    640,709.28/884,209.68 = 354,224.16/x
  3. Step 3: Cross multiply
    640,709.28x = 884,209.68 × 354,224.16
  4. Step 4: Simplify right side
    640,709.28x = 313,208,431,161.87
  5. Step 5: Solve for x
    x = 313,208,431,161.87/640,709.28
  6. Step 6: Final answer
    x = 488,846.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.