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Finding the Fourth Proportional to 526,786.75, 726,965.72 and 285,069.32

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Solution

The fourth proportional to 526,786.75, 726,965.72 and 285,069.32 is: 393,395.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,786.75 : 726,965.72 = 285,069.32 : x
  2. Step 2: Convert to fraction form
    526,786.75/726,965.72 = 285,069.32/x
  3. Step 3: Cross multiply
    526,786.75x = 726,965.72 × 285,069.32
  4. Step 4: Simplify right side
    526,786.75x = 207,235,624,512.51
  5. Step 5: Solve for x
    x = 207,235,624,512.51/526,786.75
  6. Step 6: Final answer
    x = 393,395.67

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Double scale
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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.