Home / 657,640.20-921,629.40-657,640.20

Finding the Fourth Proportional to 657,640.20, 921,629.40 and 657,640.20

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Solution

The fourth proportional to 657,640.20, 921,629.40 and 657,640.20 is: 921,629.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,640.20 : 921,629.40 = 657,640.20 : x
  2. Step 2: Convert to fraction form
    657,640.20/921,629.40 = 657,640.20/x
  3. Step 3: Cross multiply
    657,640.20x = 921,629.40 × 657,640.20
  4. Step 4: Simplify right side
    657,640.20x = 606,100,542,941.88
  5. Step 5: Solve for x
    x = 606,100,542,941.88/657,640.20
  6. Step 6: Final answer
    x = 921,629.40

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Half scale
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Double scale
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Similar ratio
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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.