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Finding the Fourth Proportional to 328,078.10, 492,117.15 and 203,489.30

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Solution

The fourth proportional to 328,078.10, 492,117.15 and 203,489.30 is: 305,233.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,078.10 : 492,117.15 = 203,489.30 : x
  2. Step 2: Convert to fraction form
    328,078.10/492,117.15 = 203,489.30/x
  3. Step 3: Cross multiply
    328,078.10x = 492,117.15 × 203,489.30
  4. Step 4: Simplify right side
    328,078.10x = 100,140,574,371.50
  5. Step 5: Solve for x
    x = 100,140,574,371.50/328,078.10
  6. Step 6: Final answer
    x = 305,233.95

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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.