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Finding the Fourth Proportional to 427,602.86, 641,507.97 and 128,082.86

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Solution

The fourth proportional to 427,602.86, 641,507.97 and 128,082.86 is: 192,155.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,602.86 : 641,507.97 = 128,082.86 : x
  2. Step 2: Convert to fraction form
    427,602.86/641,507.97 = 128,082.86/x
  3. Step 3: Cross multiply
    427,602.86x = 641,507.97 × 128,082.86
  4. Step 4: Simplify right side
    427,602.86x = 82,166,175,510.39
  5. Step 5: Solve for x
    x = 82,166,175,510.39/427,602.86
  6. Step 6: Final answer
    x = 192,155.35

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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.