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Finding the Fourth Proportional to 640,774.64, 884,233.32 and 354,277.52

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Solution

The fourth proportional to 640,774.64, 884,233.32 and 354,277.52 is: 488,883.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,774.64 : 884,233.32 = 354,277.52 : x
  2. Step 2: Convert to fraction form
    640,774.64/884,233.32 = 354,277.52/x
  3. Step 3: Cross multiply
    640,774.64x = 884,233.32 × 354,277.52
  4. Step 4: Simplify right side
    640,774.64x = 313,263,987,710.97
  5. Step 5: Solve for x
    x = 313,263,987,710.97/640,774.64
  6. Step 6: Final answer
    x = 488,883.25

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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.