Home / 718,305.18-991,260.78-412,401.28

Finding the Fourth Proportional to 718,305.18, 991,260.78 and 412,401.28

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Solution

The fourth proportional to 718,305.18, 991,260.78 and 412,401.28 is: 569,113.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,305.18 : 991,260.78 = 412,401.28 : x
  2. Step 2: Convert to fraction form
    718,305.18/991,260.78 = 412,401.28/x
  3. Step 3: Cross multiply
    718,305.18x = 991,260.78 × 412,401.28
  4. Step 4: Simplify right side
    718,305.18x = 408,797,214,485.80
  5. Step 5: Solve for x
    x = 408,797,214,485.80/718,305.18
  6. Step 6: Final answer
    x = 569,113.55

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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.