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Finding the Fourth Proportional to 686,571.88, 947,525.32 and 380,744.18

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Solution

The fourth proportional to 686,571.88, 947,525.32 and 380,744.18 is: 525,458.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,571.88 : 947,525.32 = 380,744.18 : x
  2. Step 2: Convert to fraction form
    686,571.88/947,525.32 = 380,744.18/x
  3. Step 3: Cross multiply
    686,571.88x = 947,525.32 × 380,744.18
  4. Step 4: Simplify right side
    686,571.88x = 360,764,750,992.64
  5. Step 5: Solve for x
    x = 360,764,750,992.64/686,571.88
  6. Step 6: Final answer
    x = 525,458.09

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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.