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Finding the Fourth Proportional to 716,908.12, 989,325.70 and 394,611.30

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Solution

The fourth proportional to 716,908.12, 989,325.70 and 394,611.30 is: 544,559.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,908.12 : 989,325.70 = 394,611.30 : x
  2. Step 2: Convert to fraction form
    716,908.12/989,325.70 = 394,611.30/x
  3. Step 3: Cross multiply
    716,908.12x = 989,325.70 × 394,611.30
  4. Step 4: Simplify right side
    716,908.12x = 390,399,100,600.41
  5. Step 5: Solve for x
    x = 390,399,100,600.41/716,908.12
  6. Step 6: Final answer
    x = 544,559.46

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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.