Home / 714,120.25-985,504.14-391,830.25

Finding the Fourth Proportional to 714,120.25, 985,504.14 and 391,830.25

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Solution

The fourth proportional to 714,120.25, 985,504.14 and 391,830.25 is: 540,735.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,120.25 : 985,504.14 = 391,830.25 : x
  2. Step 2: Convert to fraction form
    714,120.25/985,504.14 = 391,830.25/x
  3. Step 3: Cross multiply
    714,120.25x = 985,504.14 × 391,830.25
  4. Step 4: Simplify right side
    714,120.25x = 386,150,333,552.24
  5. Step 5: Solve for x
    x = 386,150,333,552.24/714,120.25
  6. Step 6: Final answer
    x = 540,735.73

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.