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Finding the Fourth Proportional to 717,200.64, 989,758.64 and 394,922.28

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Solution

The fourth proportional to 717,200.64, 989,758.64 and 394,922.28 is: 545,004.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,200.64 : 989,758.64 = 394,922.28 : x
  2. Step 2: Convert to fraction form
    717,200.64/989,758.64 = 394,922.28/x
  3. Step 3: Cross multiply
    717,200.64x = 989,758.64 × 394,922.28
  4. Step 4: Simplify right side
    717,200.64x = 390,877,738,758.50
  5. Step 5: Solve for x
    x = 390,877,738,758.50/717,200.64
  6. Step 6: Final answer
    x = 545,004.73

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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.