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Finding the Fourth Proportional to 655,996.32, 905,316.48 and 380,410.56

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Solution

The fourth proportional to 655,996.32, 905,316.48 and 380,410.56 is: 524,990.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,996.32 : 905,316.48 = 380,410.56 : x
  2. Step 2: Convert to fraction form
    655,996.32/905,316.48 = 380,410.56/x
  3. Step 3: Cross multiply
    655,996.32x = 905,316.48 × 380,410.56
  4. Step 4: Simplify right side
    655,996.32x = 344,391,949,134.03
  5. Step 5: Solve for x
    x = 344,391,949,134.03/655,996.32
  6. Step 6: Final answer
    x = 524,990.67

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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.