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Finding the Fourth Proportional to 716,345.75, 988,536.06 and 394,055.66

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Solution

The fourth proportional to 716,345.75, 988,536.06 and 394,055.66 is: 543,785.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,345.75 : 988,536.06 = 394,055.66 : x
  2. Step 2: Convert to fraction form
    716,345.75/988,536.06 = 394,055.66/x
  3. Step 3: Cross multiply
    716,345.75x = 988,536.06 × 394,055.66
  4. Step 4: Simplify right side
    716,345.75x = 389,538,224,614.42
  5. Step 5: Solve for x
    x = 389,538,224,614.42/716,345.75
  6. Step 6: Final answer
    x = 543,785.21

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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.