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Finding the Fourth Proportional to 716,698.50, 989,044.08 and 394,408.60

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Solution

The fourth proportional to 716,698.50, 989,044.08 and 394,408.60 is: 544,283.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,698.50 : 989,044.08 = 394,408.60 : x
  2. Step 2: Convert to fraction form
    716,698.50/989,044.08 = 394,408.60/x
  3. Step 3: Cross multiply
    716,698.50x = 989,044.08 × 394,408.60
  4. Step 4: Simplify right side
    716,698.50x = 390,087,486,979.45
  5. Step 5: Solve for x
    x = 390,087,486,979.45/716,698.50
  6. Step 6: Final answer
    x = 544,283.95

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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.