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Finding the Fourth Proportional to 326,779.12, 490,234.24 and 149,238.40

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Solution

The fourth proportional to 326,779.12, 490,234.24 and 149,238.40 is: 223,887.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,779.12 : 490,234.24 = 149,238.40 : x
  2. Step 2: Convert to fraction form
    326,779.12/490,234.24 = 149,238.40/x
  3. Step 3: Cross multiply
    326,779.12x = 490,234.24 × 149,238.40
  4. Step 4: Simplify right side
    326,779.12x = 73,161,773,602.82
  5. Step 5: Solve for x
    x = 73,161,773,602.82/326,779.12
  6. Step 6: Final answer
    x = 223,887.54

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1.5x scale

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.