Home / 419,319.38-631,779.91-379,389.56

Finding the Fourth Proportional to 419,319.38, 631,779.91 and 379,389.56

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Solution

The fourth proportional to 419,319.38, 631,779.91 and 379,389.56 is: 571,618.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,319.38 : 631,779.91 = 379,389.56 : x
  2. Step 2: Convert to fraction form
    419,319.38/631,779.91 = 379,389.56/x
  3. Step 3: Cross multiply
    419,319.38x = 631,779.91 × 379,389.56
  4. Step 4: Simplify right side
    419,319.38x = 239,690,697,964.37
  5. Step 5: Solve for x
    x = 239,690,697,964.37/419,319.38
  6. Step 6: Final answer
    x = 571,618.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.