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Finding the Fourth Proportional to 328,355.52, 492,561.23 and 103,655.85

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Solution

The fourth proportional to 328,355.52, 492,561.23 and 103,655.85 is: 155,492.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,355.52 : 492,561.23 = 103,655.85 : x
  2. Step 2: Convert to fraction form
    328,355.52/492,561.23 = 103,655.85/x
  3. Step 3: Cross multiply
    328,355.52x = 492,561.23 × 103,655.85
  4. Step 4: Simplify right side
    328,355.52x = 51,056,852,972.70
  5. Step 5: Solve for x
    x = 51,056,852,972.70/328,355.52
  6. Step 6: Final answer
    x = 155,492.60

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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.