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Finding the Fourth Proportional to 606,329.40, 911,462.40 and 430,057.20

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Solution

The fourth proportional to 606,329.40, 911,462.40 and 430,057.20 is: 646,481.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,329.40 : 911,462.40 = 430,057.20 : x
  2. Step 2: Convert to fraction form
    606,329.40/911,462.40 = 430,057.20/x
  3. Step 3: Cross multiply
    606,329.40x = 911,462.40 × 430,057.20
  4. Step 4: Simplify right side
    606,329.40x = 391,980,967,649.28
  5. Step 5: Solve for x
    x = 391,980,967,649.28/606,329.40
  6. Step 6: Final answer
    x = 646,481.88

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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.