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Finding the Fourth Proportional to 518,536.80, 777,344.40 and 341,128.80

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Solution

The fourth proportional to 518,536.80, 777,344.40 and 341,128.80 is: 511,390.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,536.80 : 777,344.40 = 341,128.80 : x
  2. Step 2: Convert to fraction form
    518,536.80/777,344.40 = 341,128.80/x
  3. Step 3: Cross multiply
    518,536.80x = 777,344.40 × 341,128.80
  4. Step 4: Simplify right side
    518,536.80x = 265,174,562,358.72
  5. Step 5: Solve for x
    x = 265,174,562,358.72/518,536.80
  6. Step 6: Final answer
    x = 511,390.05

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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.