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Finding the Fourth Proportional to 716,165.96, 988,317.26 and 393,881.43

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Solution

The fourth proportional to 716,165.96, 988,317.26 and 393,881.43 is: 543,560.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,165.96 : 988,317.26 = 393,881.43 : x
  2. Step 2: Convert to fraction form
    716,165.96/988,317.26 = 393,881.43/x
  3. Step 3: Cross multiply
    716,165.96x = 988,317.26 × 393,881.43
  4. Step 4: Simplify right side
    716,165.96x = 389,279,819,430.22
  5. Step 5: Solve for x
    x = 389,279,819,430.22/716,165.96
  6. Step 6: Final answer
    x = 543,560.91

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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.