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Finding the Fourth Proportional to 640,547.88, 883,921.56 and 354,050.88

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Solution

The fourth proportional to 640,547.88, 883,921.56 and 354,050.88 is: 488,571.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,547.88 : 883,921.56 = 354,050.88 : x
  2. Step 2: Convert to fraction form
    640,547.88/883,921.56 = 354,050.88/x
  3. Step 3: Cross multiply
    640,547.88x = 883,921.56 × 354,050.88
  4. Step 4: Simplify right side
    640,547.88x = 312,953,206,168.97
  5. Step 5: Solve for x
    x = 312,953,206,168.97/640,547.88
  6. Step 6: Final answer
    x = 488,571.14

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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.