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Finding the Fourth Proportional to 917,957.28, 1,375,951.50 and 443,990.64

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Solution

The fourth proportional to 917,957.28, 1,375,951.50 and 443,990.64 is: 665,509.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,957.28 : 1,375,951.50 = 443,990.64 : x
  2. Step 2: Convert to fraction form
    917,957.28/1,375,951.50 = 443,990.64/x
  3. Step 3: Cross multiply
    917,957.28x = 1,375,951.50 × 443,990.64
  4. Step 4: Simplify right side
    917,957.28x = 610,909,587,093.96
  5. Step 5: Solve for x
    x = 610,909,587,093.96/917,957.28
  6. Step 6: Final answer
    x = 665,509.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.