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Finding the Fourth Proportional to 328,691.50, 493,111.16 and 104,065.40

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Solution

The fourth proportional to 328,691.50, 493,111.16 and 104,065.40 is: 156,121.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,691.50 : 493,111.16 = 104,065.40 : x
  2. Step 2: Convert to fraction form
    328,691.50/493,111.16 = 104,065.40/x
  3. Step 3: Cross multiply
    328,691.50x = 493,111.16 × 104,065.40
  4. Step 4: Simplify right side
    328,691.50x = 51,315,810,109.86
  5. Step 5: Solve for x
    x = 51,315,810,109.86/328,691.50
  6. Step 6: Final answer
    x = 156,121.50

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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.