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Finding the Fourth Proportional to 343,979.40, 515,796.30 and 156,779.40

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Solution

The fourth proportional to 343,979.40, 515,796.30 and 156,779.40 is: 235,090.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,979.40 : 515,796.30 = 156,779.40 : x
  2. Step 2: Convert to fraction form
    343,979.40/515,796.30 = 156,779.40/x
  3. Step 3: Cross multiply
    343,979.40x = 515,796.30 × 156,779.40
  4. Step 4: Simplify right side
    343,979.40x = 80,866,234,436.22
  5. Step 5: Solve for x
    x = 80,866,234,436.22/343,979.40
  6. Step 6: Final answer
    x = 235,090.34

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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.