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Finding the Fourth Proportional to 716,685.67, 989,026.39 and 394,395.77

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Solution

The fourth proportional to 716,685.67, 989,026.39 and 394,395.77 is: 544,266.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,685.67 : 989,026.39 = 394,395.77 : x
  2. Step 2: Convert to fraction form
    716,685.67/989,026.39 = 394,395.77/x
  3. Step 3: Cross multiply
    716,685.67x = 989,026.39 × 394,395.77
  4. Step 4: Simplify right side
    716,685.67x = 390,067,824,634.37
  5. Step 5: Solve for x
    x = 390,067,824,634.37/716,685.67
  6. Step 6: Final answer
    x = 544,266.25

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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.