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Finding the Fourth Proportional to 718,463.44, 991,458.34 and 396,173.46

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Solution

The fourth proportional to 718,463.44, 991,458.34 and 396,173.46 is: 546,707.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,463.44 : 991,458.34 = 396,173.46 : x
  2. Step 2: Convert to fraction form
    718,463.44/991,458.34 = 396,173.46/x
  3. Step 3: Cross multiply
    718,463.44x = 991,458.34 × 396,173.46
  4. Step 4: Simplify right side
    718,463.44x = 392,789,475,922.88
  5. Step 5: Solve for x
    x = 392,789,475,922.88/718,463.44
  6. Step 6: Final answer
    x = 546,707.67

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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.