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Finding the Fourth Proportional to 717,949.48, 990,777 and 395,671.36

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Solution

The fourth proportional to 717,949.48, 990,777 and 395,671.36 is: 546,030.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,949.48 : 990,777 = 395,671.36 : x
  2. Step 2: Convert to fraction form
    717,949.48/990,777 = 395,671.36/x
  3. Step 3: Cross multiply
    717,949.48x = 990,777 × 395,671.36
  4. Step 4: Simplify right side
    717,949.48x = 392,022,083,046.72
  5. Step 5: Solve for x
    x = 392,022,083,046.72/717,949.48
  6. Step 6: Final answer
    x = 546,030.18

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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.