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Finding the Fourth Proportional to 377,089.65, 520,235.55 and 215,857.89

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Solution

The fourth proportional to 377,089.65, 520,235.55 and 215,857.89 is: 297,799.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,089.65 : 520,235.55 = 215,857.89 : x
  2. Step 2: Convert to fraction form
    377,089.65/520,235.55 = 215,857.89/x
  3. Step 3: Cross multiply
    377,089.65x = 520,235.55 × 215,857.89
  4. Step 4: Simplify right side
    377,089.65x = 112,296,948,125.99
  5. Step 5: Solve for x
    x = 112,296,948,125.99/377,089.65
  6. Step 6: Final answer
    x = 297,799.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.