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Finding the Fourth Proportional to 716,861.42, 989,260.92 and 394,564.58

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Solution

The fourth proportional to 716,861.42, 989,260.92 and 394,564.58 is: 544,494.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,861.42 : 989,260.92 = 394,564.58 : x
  2. Step 2: Convert to fraction form
    716,861.42/989,260.92 = 394,564.58/x
  3. Step 3: Cross multiply
    716,861.42x = 989,260.92 × 394,564.58
  4. Step 4: Simplify right side
    716,861.42x = 390,327,319,410.21
  5. Step 5: Solve for x
    x = 390,327,319,410.21/716,861.42
  6. Step 6: Final answer
    x = 544,494.81

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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.