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Finding the Fourth Proportional to 426,779.56, 636,279.62 and 415,873.72

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Solution

The fourth proportional to 426,779.56, 636,279.62 and 415,873.72 is: 620,020.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,779.56 : 636,279.62 = 415,873.72 : x
  2. Step 2: Convert to fraction form
    426,779.56/636,279.62 = 415,873.72/x
  3. Step 3: Cross multiply
    426,779.56x = 636,279.62 × 415,873.72
  4. Step 4: Simplify right side
    426,779.56x = 264,611,972,529.59
  5. Step 5: Solve for x
    x = 264,611,972,529.59/426,779.56
  6. Step 6: Final answer
    x = 620,020.26

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.