Home / 445,147.68-613,946.40-391,318.56

Finding the Fourth Proportional to 445,147.68, 613,946.40 and 391,318.56

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Solution

The fourth proportional to 445,147.68, 613,946.40 and 391,318.56 is: 539,705.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,147.68 : 613,946.40 = 391,318.56 : x
  2. Step 2: Convert to fraction form
    445,147.68/613,946.40 = 391,318.56/x
  3. Step 3: Cross multiply
    445,147.68x = 613,946.40 × 391,318.56
  4. Step 4: Simplify right side
    445,147.68x = 240,248,621,165.18
  5. Step 5: Solve for x
    x = 240,248,621,165.18/445,147.68
  6. Step 6: Final answer
    x = 539,705.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.