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Finding the Fourth Proportional to 424,567.10, 636,779.17 and 120,939.93

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Solution

The fourth proportional to 424,567.10, 636,779.17 and 120,939.93 is: 181,389.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,567.10 : 636,779.17 = 120,939.93 : x
  2. Step 2: Convert to fraction form
    424,567.10/636,779.17 = 120,939.93/x
  3. Step 3: Cross multiply
    424,567.10x = 636,779.17 × 120,939.93
  4. Step 4: Simplify right side
    424,567.10x = 77,012,028,245.26
  5. Step 5: Solve for x
    x = 77,012,028,245.26/424,567.10
  6. Step 6: Final answer
    x = 181,389.53

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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.