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Finding the Fourth Proportional to 716,897.01, 989,318.15 and 394,604.79

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Solution

The fourth proportional to 716,897.01, 989,318.15 and 394,604.79 is: 544,554.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,897.01 : 989,318.15 = 394,604.79 : x
  2. Step 2: Convert to fraction form
    716,897.01/989,318.15 = 394,604.79/x
  3. Step 3: Cross multiply
    716,897.01x = 989,318.15 × 394,604.79
  4. Step 4: Simplify right side
    716,897.01x = 390,389,678,850.92
  5. Step 5: Solve for x
    x = 390,389,678,850.92/716,897.01
  6. Step 6: Final answer
    x = 544,554.76

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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.