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Finding the Fourth Proportional to 393,442.83, 542,986.88 and 223,676.55

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Solution

The fourth proportional to 393,442.83, 542,986.88 and 223,676.55 is: 308,693.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,442.83 : 542,986.88 = 223,676.55 : x
  2. Step 2: Convert to fraction form
    393,442.83/542,986.88 = 223,676.55/x
  3. Step 3: Cross multiply
    393,442.83x = 542,986.88 × 223,676.55
  4. Step 4: Simplify right side
    393,442.83x = 121,453,430,895.28
  5. Step 5: Solve for x
    x = 121,453,430,895.28/393,442.83
  6. Step 6: Final answer
    x = 308,693.97

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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.