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Finding the Fourth Proportional to 681,780.96, 940,889.76 and 379,977.12

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Solution

The fourth proportional to 681,780.96, 940,889.76 and 379,977.12 is: 524,386.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,780.96 : 940,889.76 = 379,977.12 : x
  2. Step 2: Convert to fraction form
    681,780.96/940,889.76 = 379,977.12/x
  3. Step 3: Cross multiply
    681,780.96x = 940,889.76 × 379,977.12
  4. Step 4: Simplify right side
    681,780.96x = 357,516,581,242.29
  5. Step 5: Solve for x
    x = 357,516,581,242.29/681,780.96
  6. Step 6: Final answer
    x = 524,386.28

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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.