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Finding the Fourth Proportional to 620,124.40, 930,186.60 and 431,167.60

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Solution

The fourth proportional to 620,124.40, 930,186.60 and 431,167.60 is: 646,751.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,124.40 : 930,186.60 = 431,167.60 : x
  2. Step 2: Convert to fraction form
    620,124.40/930,186.60 = 431,167.60/x
  3. Step 3: Cross multiply
    620,124.40x = 930,186.60 × 431,167.60
  4. Step 4: Simplify right side
    620,124.40x = 401,066,323,874.16
  5. Step 5: Solve for x
    x = 401,066,323,874.16/620,124.40
  6. Step 6: Final answer
    x = 646,751.40

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.