Home / 640,928.27-884,478.83-354,442.21

Finding the Fourth Proportional to 640,928.27, 884,478.83 and 354,442.21

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Solution

The fourth proportional to 640,928.27, 884,478.83 and 354,442.21 is: 489,129.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,928.27 : 884,478.83 = 354,442.21 : x
  2. Step 2: Convert to fraction form
    640,928.27/884,478.83 = 354,442.21/x
  3. Step 3: Cross multiply
    640,928.27x = 884,478.83 × 354,442.21
  4. Step 4: Simplify right side
    640,928.27x = 313,496,627,220.01
  5. Step 5: Solve for x
    x = 313,496,627,220.01/640,928.27
  6. Step 6: Final answer
    x = 489,129.03

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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.