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Finding the Fourth Proportional to 328,411.08, 492,631.27 and 100,690.31

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Solution

The fourth proportional to 328,411.08, 492,631.27 and 100,690.31 is: 151,039.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,411.08 : 492,631.27 = 100,690.31 : x
  2. Step 2: Convert to fraction form
    328,411.08/492,631.27 = 100,690.31/x
  3. Step 3: Cross multiply
    328,411.08x = 492,631.27 × 100,690.31
  4. Step 4: Simplify right side
    328,411.08x = 49,603,196,271.85
  5. Step 5: Solve for x
    x = 49,603,196,271.85/328,411.08
  6. Step 6: Final answer
    x = 151,039.96

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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.