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Finding the Fourth Proportional to 392,779.44, 542,051.28 and 223,029.36

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Solution

The fourth proportional to 392,779.44, 542,051.28 and 223,029.36 is: 307,789.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,779.44 : 542,051.28 = 223,029.36 : x
  2. Step 2: Convert to fraction form
    392,779.44/542,051.28 = 223,029.36/x
  3. Step 3: Cross multiply
    392,779.44x = 542,051.28 × 223,029.36
  4. Step 4: Simplify right side
    392,779.44x = 120,893,350,065.58
  5. Step 5: Solve for x
    x = 120,893,350,065.58/392,779.44
  6. Step 6: Final answer
    x = 307,789.40

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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.