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Finding the Fourth Proportional to 717,959.12, 990,783.59 and 395,669.22

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Solution

The fourth proportional to 717,959.12, 990,783.59 and 395,669.22 is: 546,023.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,959.12 : 990,783.59 = 395,669.22 : x
  2. Step 2: Convert to fraction form
    717,959.12/990,783.59 = 395,669.22/x
  3. Step 3: Cross multiply
    717,959.12x = 990,783.59 × 395,669.22
  4. Step 4: Simplify right side
    717,959.12x = 392,022,568,265.75
  5. Step 5: Solve for x
    x = 392,022,568,265.75/717,959.12
  6. Step 6: Final answer
    x = 546,023.53

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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.