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Finding the Fourth Proportional to 656,820.32, 906,411.54 and 355,014.32

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Solution

The fourth proportional to 656,820.32, 906,411.54 and 355,014.32 is: 489,919.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,820.32 : 906,411.54 = 355,014.32 : x
  2. Step 2: Convert to fraction form
    656,820.32/906,411.54 = 355,014.32/x
  3. Step 3: Cross multiply
    656,820.32x = 906,411.54 × 355,014.32
  4. Step 4: Simplify right side
    656,820.32x = 321,789,076,513.25
  5. Step 5: Solve for x
    x = 321,789,076,513.25/656,820.32
  6. Step 6: Final answer
    x = 489,919.49

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Double scale
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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.