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Finding the Fourth Proportional to 328,312.51, 492,442.84 and 103,679.67

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Solution

The fourth proportional to 328,312.51, 492,442.84 and 103,679.67 is: 155,511.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,312.51 : 492,442.84 = 103,679.67 : x
  2. Step 2: Convert to fraction form
    328,312.51/492,442.84 = 103,679.67/x
  3. Step 3: Cross multiply
    328,312.51x = 492,442.84 × 103,679.67
  4. Step 4: Simplify right side
    328,312.51x = 51,056,311,145.06
  5. Step 5: Solve for x
    x = 51,056,311,145.06/328,312.51
  6. Step 6: Final answer
    x = 155,511.32

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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.