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Finding the Fourth Proportional to 716,345.22, 988,558.68 and 394,079.82

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Solution

The fourth proportional to 716,345.22, 988,558.68 and 394,079.82 is: 543,831.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,345.22 : 988,558.68 = 394,079.82 : x
  2. Step 2: Convert to fraction form
    716,345.22/988,558.68 = 394,079.82/x
  3. Step 3: Cross multiply
    716,345.22x = 988,558.68 × 394,079.82
  4. Step 4: Simplify right side
    716,345.22x = 389,571,026,673.84
  5. Step 5: Solve for x
    x = 389,571,026,673.84/716,345.22
  6. Step 6: Final answer
    x = 543,831.40

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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.