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Finding the Fourth Proportional to 1,376,461.80, 1,899,820.80 and 764,824.68

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Solution

The fourth proportional to 1,376,461.80, 1,899,820.80 and 764,824.68 is: 1,055,626.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376,461.80 : 1,899,820.80 = 764,824.68 : x
  2. Step 2: Convert to fraction form
    1,376,461.80/1,899,820.80 = 764,824.68/x
  3. Step 3: Cross multiply
    1,376,461.80x = 1,899,820.80 × 764,824.68
  4. Step 4: Simplify right side
    1,376,461.80x = 1,453,029,835,417.34
  5. Step 5: Solve for x
    x = 1,453,029,835,417.34/1,376,461.80
  6. Step 6: Final answer
    x = 1,055,626.71

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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.