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Finding the Fourth Proportional to 485,407.24, 669,833.16 and 278,627.88

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Solution

The fourth proportional to 485,407.24, 669,833.16 and 278,627.88 is: 384,489.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,407.24 : 669,833.16 = 278,627.88 : x
  2. Step 2: Convert to fraction form
    485,407.24/669,833.16 = 278,627.88/x
  3. Step 3: Cross multiply
    485,407.24x = 669,833.16 × 278,627.88
  4. Step 4: Simplify right side
    485,407.24x = 186,634,193,324.50
  5. Step 5: Solve for x
    x = 186,634,193,324.50/485,407.24
  6. Step 6: Final answer
    x = 384,489.93

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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.