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Finding the Fourth Proportional to 439,816.60, 616,987.40 and 439,816.60

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Solution

The fourth proportional to 439,816.60, 616,987.40 and 439,816.60 is: 616,987.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,816.60 : 616,987.40 = 439,816.60 : x
  2. Step 2: Convert to fraction form
    439,816.60/616,987.40 = 439,816.60/x
  3. Step 3: Cross multiply
    439,816.60x = 616,987.40 × 439,816.60
  4. Step 4: Simplify right side
    439,816.60x = 271,361,300,510.84
  5. Step 5: Solve for x
    x = 271,361,300,510.84/439,816.60
  6. Step 6: Final answer
    x = 616,987.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.