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Finding the Fourth Proportional to 328,011.80, 492,045.86 and 91,354.46

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Solution

The fourth proportional to 328,011.80, 492,045.86 and 91,354.46 is: 137,039.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,011.80 : 492,045.86 = 91,354.46 : x
  2. Step 2: Convert to fraction form
    328,011.80/492,045.86 = 91,354.46/x
  3. Step 3: Cross multiply
    328,011.80x = 492,045.86 × 91,354.46
  4. Step 4: Simplify right side
    328,011.80x = 44,950,581,603.69
  5. Step 5: Solve for x
    x = 44,950,581,603.69/328,011.80
  6. Step 6: Final answer
    x = 137,039.53

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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.