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Finding the Fourth Proportional to 626,574.80, 939,862.20 and 413,998.40

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Solution

The fourth proportional to 626,574.80, 939,862.20 and 413,998.40 is: 620,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,574.80 : 939,862.20 = 413,998.40 : x
  2. Step 2: Convert to fraction form
    626,574.80/939,862.20 = 413,998.40/x
  3. Step 3: Cross multiply
    626,574.80x = 939,862.20 × 413,998.40
  4. Step 4: Simplify right side
    626,574.80x = 389,101,447,020.48
  5. Step 5: Solve for x
    x = 389,101,447,020.48/626,574.80
  6. Step 6: Final answer
    x = 620,997.60

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