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Finding the Fourth Proportional to 328,528.84, 492,846.51 and 128,740.90

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Solution

The fourth proportional to 328,528.84, 492,846.51 and 128,740.90 is: 193,132.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,528.84 : 492,846.51 = 128,740.90 : x
  2. Step 2: Convert to fraction form
    328,528.84/492,846.51 = 128,740.90/x
  3. Step 3: Cross multiply
    328,528.84x = 492,846.51 × 128,740.90
  4. Step 4: Simplify right side
    328,528.84x = 63,449,500,795.03
  5. Step 5: Solve for x
    x = 63,449,500,795.03/328,528.84
  6. Step 6: Final answer
    x = 193,132.21

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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.