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Finding the Fourth Proportional to 1,409,343.38, 1,944,899.02 and 764,763.55

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Solution

The fourth proportional to 1,409,343.38, 1,944,899.02 and 764,763.55 is: 1,055,376.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409,343.38 : 1,944,899.02 = 764,763.55 : x
  2. Step 2: Convert to fraction form
    1,409,343.38/1,944,899.02 = 764,763.55/x
  3. Step 3: Cross multiply
    1,409,343.38x = 1,944,899.02 × 764,763.55
  4. Step 4: Simplify right side
    1,409,343.38x = 1,487,387,875,020.43
  5. Step 5: Solve for x
    x = 1,487,387,875,020.43/1,409,343.38
  6. Step 6: Final answer
    x = 1,055,376.49

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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.