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Finding the Fourth Proportional to 613,859.20, 847,256.40 and 412,538.56

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Solution

The fourth proportional to 613,859.20, 847,256.40 and 412,538.56 is: 569,391.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,859.20 : 847,256.40 = 412,538.56 : x
  2. Step 2: Convert to fraction form
    613,859.20/847,256.40 = 412,538.56/x
  3. Step 3: Cross multiply
    613,859.20x = 847,256.40 × 412,538.56
  4. Step 4: Simplify right side
    613,859.20x = 349,525,935,206.78
  5. Step 5: Solve for x
    x = 349,525,935,206.78/613,859.20
  6. Step 6: Final answer
    x = 569,391.05

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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.