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Finding the Fourth Proportional to 328,102.95, 492,195.49 and 128,397.56

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Solution

The fourth proportional to 328,102.95, 492,195.49 and 128,397.56 is: 192,612.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,102.95 : 492,195.49 = 128,397.56 : x
  2. Step 2: Convert to fraction form
    328,102.95/492,195.49 = 128,397.56/x
  3. Step 3: Cross multiply
    328,102.95x = 492,195.49 × 128,397.56
  4. Step 4: Simplify right side
    328,102.95x = 63,196,697,177.03
  5. Step 5: Solve for x
    x = 63,196,697,177.03/328,102.95
  6. Step 6: Final answer
    x = 192,612.40

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1.5x scale

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.