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Finding the Fourth Proportional to 311,646.64, 430,072.50 and 168,406.69

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Solution

The fourth proportional to 311,646.64, 430,072.50 and 168,406.69 is: 232,401.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,646.64 : 430,072.50 = 168,406.69 : x
  2. Step 2: Convert to fraction form
    311,646.64/430,072.50 = 168,406.69/x
  3. Step 3: Cross multiply
    311,646.64x = 430,072.50 × 168,406.69
  4. Step 4: Simplify right side
    311,646.64x = 72,427,086,185.03
  5. Step 5: Solve for x
    x = 72,427,086,185.03/311,646.64
  6. Step 6: Final answer
    x = 232,401.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.