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Finding the Fourth Proportional to 604,540.90, 908,779.65 and 428,268.70

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Solution

The fourth proportional to 604,540.90, 908,779.65 and 428,268.70 is: 643,797.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,540.90 : 908,779.65 = 428,268.70 : x
  2. Step 2: Convert to fraction form
    604,540.90/908,779.65 = 428,268.70/x
  3. Step 3: Cross multiply
    604,540.90x = 908,779.65 × 428,268.70
  4. Step 4: Simplify right side
    604,540.90x = 389,201,879,291.96
  5. Step 5: Solve for x
    x = 389,201,879,291.96/604,540.90
  6. Step 6: Final answer
    x = 643,797.43

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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.