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Finding the Fourth Proportional to 716,969.22, 989,434.89 and 394,689.66

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Solution

The fourth proportional to 716,969.22, 989,434.89 and 394,689.66 is: 544,681.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,969.22 : 989,434.89 = 394,689.66 : x
  2. Step 2: Convert to fraction form
    716,969.22/989,434.89 = 394,689.66/x
  3. Step 3: Cross multiply
    716,969.22x = 989,434.89 × 394,689.66
  4. Step 4: Simplify right side
    716,969.22x = 390,519,720,326.24
  5. Step 5: Solve for x
    x = 390,519,720,326.24/716,969.22
  6. Step 6: Final answer
    x = 544,681.29

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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.