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Finding the Fourth Proportional to 328,258.05, 492,189.98 and 128,340.06

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Solution

The fourth proportional to 328,258.05, 492,189.98 and 128,340.06 is: 192,433.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,258.05 : 492,189.98 = 128,340.06 : x
  2. Step 2: Convert to fraction form
    328,258.05/492,189.98 = 128,340.06/x
  3. Step 3: Cross multiply
    328,258.05x = 492,189.98 × 128,340.06
  4. Step 4: Simplify right side
    328,258.05x = 63,167,690,922.90
  5. Step 5: Solve for x
    x = 63,167,690,922.90/328,258.05
  6. Step 6: Final answer
    x = 192,433.03

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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.