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Finding the Fourth Proportional to 385,911.86, 578,923.83 and 119,693.82

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Solution

The fourth proportional to 385,911.86, 578,923.83 and 119,693.82 is: 179,558.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,911.86 : 578,923.83 = 119,693.82 : x
  2. Step 2: Convert to fraction form
    385,911.86/578,923.83 = 119,693.82/x
  3. Step 3: Cross multiply
    385,911.86x = 578,923.83 × 119,693.82
  4. Step 4: Simplify right side
    385,911.86x = 69,293,604,701.73
  5. Step 5: Solve for x
    x = 69,293,604,701.73/385,911.86
  6. Step 6: Final answer
    x = 179,558.11

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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.