Home / 1,438,505.28-2,155,953.63-762,919.11

Finding the Fourth Proportional to 1,438,505.28, 2,155,953.63 and 762,919.11

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Solution

The fourth proportional to 1,438,505.28, 2,155,953.63 and 762,919.11 is: 1,143,421.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438,505.28 : 2,155,953.63 = 762,919.11 : x
  2. Step 2: Convert to fraction form
    1,438,505.28/2,155,953.63 = 762,919.11/x
  3. Step 3: Cross multiply
    1,438,505.28x = 2,155,953.63 × 762,919.11
  4. Step 4: Simplify right side
    1,438,505.28x = 1,644,818,224,600.87
  5. Step 5: Solve for x
    x = 1,644,818,224,600.87/1,438,505.28
  6. Step 6: Final answer
    x = 1,143,421.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.