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Finding the Fourth Proportional to 622,194.98, 858,693.57 and 380,638.40

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Solution

The fourth proportional to 622,194.98, 858,693.57 and 380,638.40 is: 525,320.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,194.98 : 858,693.57 = 380,638.40 : x
  2. Step 2: Convert to fraction form
    622,194.98/858,693.57 = 380,638.40/x
  3. Step 3: Cross multiply
    622,194.98x = 858,693.57 × 380,638.40
  4. Step 4: Simplify right side
    622,194.98x = 326,851,746,575.09
  5. Step 5: Solve for x
    x = 326,851,746,575.09/622,194.98
  6. Step 6: Final answer
    x = 525,320.45

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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.