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Finding the Fourth Proportional to 384,089.80, 575,645.10 and 215,609.80

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Solution

The fourth proportional to 384,089.80, 575,645.10 and 215,609.80 is: 323,139.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,089.80 : 575,645.10 = 215,609.80 : x
  2. Step 2: Convert to fraction form
    384,089.80/575,645.10 = 215,609.80/x
  3. Step 3: Cross multiply
    384,089.80x = 575,645.10 × 215,609.80
  4. Step 4: Simplify right side
    384,089.80x = 124,114,724,881.98
  5. Step 5: Solve for x
    x = 124,114,724,881.98/384,089.80
  6. Step 6: Final answer
    x = 323,139.86

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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.