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Finding the Fourth Proportional to 717,039.40, 989,498.80 and 394,737.16

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Solution

The fourth proportional to 717,039.40, 989,498.80 and 394,737.16 is: 544,728.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,039.40 : 989,498.80 = 394,737.16 : x
  2. Step 2: Convert to fraction form
    717,039.40/989,498.80 = 394,737.16/x
  3. Step 3: Cross multiply
    717,039.40x = 989,498.80 × 394,737.16
  4. Step 4: Simplify right side
    717,039.40x = 390,591,946,135.41
  5. Step 5: Solve for x
    x = 390,591,946,135.41/717,039.40
  6. Step 6: Final answer
    x = 544,728.71

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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.