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Finding the Fourth Proportional to 716,529.54, 988,790.37 and 394,239.86

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Solution

The fourth proportional to 716,529.54, 988,790.37 and 394,239.86 is: 544,039.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,529.54 : 988,790.37 = 394,239.86 : x
  2. Step 2: Convert to fraction form
    716,529.54/988,790.37 = 394,239.86/x
  3. Step 3: Cross multiply
    716,529.54x = 988,790.37 × 394,239.86
  4. Step 4: Simplify right side
    716,529.54x = 389,820,572,094.20
  5. Step 5: Solve for x
    x = 389,820,572,094.20/716,529.54
  6. Step 6: Final answer
    x = 544,039.78

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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.