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Finding the Fourth Proportional to 718,372, 1,077,563.40 and 318,905.38

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Solution

The fourth proportional to 718,372, 1,077,563.40 and 318,905.38 is: 478,360.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,372 : 1,077,563.40 = 318,905.38 : x
  2. Step 2: Convert to fraction form
    718,372/1,077,563.40 = 318,905.38/x
  3. Step 3: Cross multiply
    718,372x = 1,077,563.40 × 318,905.38
  4. Step 4: Simplify right side
    718,372x = 343,640,765,551.09
  5. Step 5: Solve for x
    x = 343,640,765,551.09/718,372
  6. Step 6: Final answer
    x = 478,360.47

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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.