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Finding the Fourth Proportional to 620,593.80, 930,015.90 and 383,231.40

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Solution

The fourth proportional to 620,593.80, 930,015.90 and 383,231.40 is: 574,306.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,593.80 : 930,015.90 = 383,231.40 : x
  2. Step 2: Convert to fraction form
    620,593.80/930,015.90 = 383,231.40/x
  3. Step 3: Cross multiply
    620,593.80x = 930,015.90 × 383,231.40
  4. Step 4: Simplify right side
    620,593.80x = 356,411,295,379.26
  5. Step 5: Solve for x
    x = 356,411,295,379.26/620,593.80
  6. Step 6: Final answer
    x = 574,306.89

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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.