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Finding the Fourth Proportional to 385,658.33, 578,499.81 and 119,421.15

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Solution

The fourth proportional to 385,658.33, 578,499.81 and 119,421.15 is: 179,135.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,658.33 : 578,499.81 = 119,421.15 : x
  2. Step 2: Convert to fraction form
    385,658.33/578,499.81 = 119,421.15/x
  3. Step 3: Cross multiply
    385,658.33x = 578,499.81 × 119,421.15
  4. Step 4: Simplify right side
    385,658.33x = 69,085,113,221.84
  5. Step 5: Solve for x
    x = 69,085,113,221.84/385,658.33
  6. Step 6: Final answer
    x = 179,135.54

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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.