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Finding the Fourth Proportional to 389,046.53, 536,888.30 and 219,280.65

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Solution

The fourth proportional to 389,046.53, 536,888.30 and 219,280.65 is: 302,609.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,046.53 : 536,888.30 = 219,280.65 : x
  2. Step 2: Convert to fraction form
    389,046.53/536,888.30 = 219,280.65/x
  3. Step 3: Cross multiply
    389,046.53x = 536,888.30 × 219,280.65
  4. Step 4: Simplify right side
    389,046.53x = 117,729,215,401.40
  5. Step 5: Solve for x
    x = 117,729,215,401.40/389,046.53
  6. Step 6: Final answer
    x = 302,609.61

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1.5x scale

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.