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Finding the Fourth Proportional to 328,703.14, 492,680.98 and 139,045.13

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Solution

The fourth proportional to 328,703.14, 492,680.98 and 139,045.13 is: 208,409.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,703.14 : 492,680.98 = 139,045.13 : x
  2. Step 2: Convert to fraction form
    328,703.14/492,680.98 = 139,045.13/x
  3. Step 3: Cross multiply
    328,703.14x = 492,680.98 × 139,045.13
  4. Step 4: Simplify right side
    328,703.14x = 68,504,891,856.25
  5. Step 5: Solve for x
    x = 68,504,891,856.25/328,703.14
  6. Step 6: Final answer
    x = 208,409.61

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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.