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Finding the Fourth Proportional to 485,756.12, 728,682.78 and 148,792.88

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Solution

The fourth proportional to 485,756.12, 728,682.78 and 148,792.88 is: 223,204.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,756.12 : 728,682.78 = 148,792.88 : x
  2. Step 2: Convert to fraction form
    485,756.12/728,682.78 = 148,792.88/x
  3. Step 3: Cross multiply
    485,756.12x = 728,682.78 × 148,792.88
  4. Step 4: Simplify right side
    485,756.12x = 108,422,811,822.29
  5. Step 5: Solve for x
    x = 108,422,811,822.29/485,756.12
  6. Step 6: Final answer
    x = 223,204.21

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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.