Home / 415,930.40-623,895.60-412,431.20

Finding the Fourth Proportional to 415,930.40, 623,895.60 and 412,431.20

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Solution

The fourth proportional to 415,930.40, 623,895.60 and 412,431.20 is: 618,646.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,930.40 : 623,895.60 = 412,431.20 : x
  2. Step 2: Convert to fraction form
    415,930.40/623,895.60 = 412,431.20/x
  3. Step 3: Cross multiply
    415,930.40x = 623,895.60 × 412,431.20
  4. Step 4: Simplify right side
    415,930.40x = 257,314,010,982.72
  5. Step 5: Solve for x
    x = 257,314,010,982.72/415,930.40
  6. Step 6: Final answer
    x = 618,646.80

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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.