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Finding the Fourth Proportional to 717,223.17, 989,774.46 and 394,944.69

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Solution

The fourth proportional to 717,223.17, 989,774.46 and 394,944.69 is: 545,027.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,223.17 : 989,774.46 = 394,944.69 : x
  2. Step 2: Convert to fraction form
    717,223.17/989,774.46 = 394,944.69/x
  3. Step 3: Cross multiply
    717,223.17x = 989,774.46 × 394,944.69
  4. Step 4: Simplify right side
    717,223.17x = 390,906,167,274.62
  5. Step 5: Solve for x
    x = 390,906,167,274.62/717,223.17
  6. Step 6: Final answer
    x = 545,027.24

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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.