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Finding the Fourth Proportional to 718,373, 1,077,564.90 and 318,906.38

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Solution

The fourth proportional to 718,373, 1,077,564.90 and 318,906.38 is: 478,361.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,373 : 1,077,564.90 = 318,906.38 : x
  2. Step 2: Convert to fraction form
    718,373/1,077,564.90 = 318,906.38/x
  3. Step 3: Cross multiply
    718,373x = 1,077,564.90 × 318,906.38
  4. Step 4: Simplify right side
    718,373x = 343,642,321,474.06
  5. Step 5: Solve for x
    x = 343,642,321,474.06/718,373
  6. Step 6: Final answer
    x = 478,361.97

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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.