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Finding the Fourth Proportional to 717,195, 989,750.87 and 394,916.63

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Solution

The fourth proportional to 717,195, 989,750.87 and 394,916.63 is: 544,996.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,195 : 989,750.87 = 394,916.63 : x
  2. Step 2: Convert to fraction form
    717,195/989,750.87 = 394,916.63/x
  3. Step 3: Cross multiply
    717,195x = 989,750.87 × 394,916.63
  4. Step 4: Simplify right side
    717,195x = 390,869,078,119.97
  5. Step 5: Solve for x
    x = 390,869,078,119.97/717,195
  6. Step 6: Final answer
    x = 544,996.94

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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.