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Finding the Fourth Proportional to 642,468.80, 886,606.08 and 356,007.44

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Solution

The fourth proportional to 642,468.80, 886,606.08 and 356,007.44 is: 491,289.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,468.80 : 886,606.08 = 356,007.44 : x
  2. Step 2: Convert to fraction form
    642,468.80/886,606.08 = 356,007.44/x
  3. Step 3: Cross multiply
    642,468.80x = 886,606.08 × 356,007.44
  4. Step 4: Simplify right side
    642,468.80x = 315,638,360,829.24
  5. Step 5: Solve for x
    x = 315,638,360,829.24/642,468.80
  6. Step 6: Final answer
    x = 491,289.79

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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.