Home / 718,042.37-990,904.50-395,753.30

Finding the Fourth Proportional to 718,042.37, 990,904.50 and 395,753.30

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Solution

The fourth proportional to 718,042.37, 990,904.50 and 395,753.30 is: 546,142.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,042.37 : 990,904.50 = 395,753.30 : x
  2. Step 2: Convert to fraction form
    718,042.37/990,904.50 = 395,753.30/x
  3. Step 3: Cross multiply
    718,042.37x = 990,904.50 × 395,753.30
  4. Step 4: Simplify right side
    718,042.37x = 392,153,720,905.33
  5. Step 5: Solve for x
    x = 392,153,720,905.33/718,042.37
  6. Step 6: Final answer
    x = 546,142.87

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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.