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Finding the Fourth Proportional to 626,575.80, 939,863.70 and 413,999.40

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Solution

The fourth proportional to 626,575.80, 939,863.70 and 413,999.40 is: 620,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,575.80 : 939,863.70 = 413,999.40 : x
  2. Step 2: Convert to fraction form
    626,575.80/939,863.70 = 413,999.40/x
  3. Step 3: Cross multiply
    626,575.80x = 939,863.70 × 413,999.40
  4. Step 4: Simplify right side
    626,575.80x = 389,103,007,881.78
  5. Step 5: Solve for x
    x = 389,103,007,881.78/626,575.80
  6. Step 6: Final answer
    x = 620,999.10

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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.