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Finding the Fourth Proportional to 339,666.46, 509,587.17 and 129,189.58

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Solution

The fourth proportional to 339,666.46, 509,587.17 and 129,189.58 is: 193,817.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,666.46 : 509,587.17 = 129,189.58 : x
  2. Step 2: Convert to fraction form
    339,666.46/509,587.17 = 129,189.58/x
  3. Step 3: Cross multiply
    339,666.46x = 509,587.17 × 129,189.58
  4. Step 4: Simplify right side
    339,666.46x = 65,833,352,465.69
  5. Step 5: Solve for x
    x = 65,833,352,465.69/339,666.46
  6. Step 6: Final answer
    x = 193,817.64

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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.