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Finding the Fourth Proportional to 1,351,865.31, 1,865,446.53 and 807,892.80

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Solution

The fourth proportional to 1,351,865.31, 1,865,446.53 and 807,892.80 is: 1,114,815.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351,865.31 : 1,865,446.53 = 807,892.80 : x
  2. Step 2: Convert to fraction form
    1,351,865.31/1,865,446.53 = 807,892.80/x
  3. Step 3: Cross multiply
    1,351,865.31x = 1,865,446.53 × 807,892.80
  4. Step 4: Simplify right side
    1,351,865.31x = 1,507,080,820,371.98
  5. Step 5: Solve for x
    x = 1,507,080,820,371.98/1,351,865.31
  6. Step 6: Final answer
    x = 1,114,815.81

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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.