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Finding the Fourth Proportional to 339,549.72, 509,545.72 and 129,189.48

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Solution

The fourth proportional to 339,549.72, 509,545.72 and 129,189.48 is: 193,868.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,549.72 : 509,545.72 = 129,189.48 : x
  2. Step 2: Convert to fraction form
    339,549.72/509,545.72 = 129,189.48/x
  3. Step 3: Cross multiply
    339,549.72x = 509,545.72 × 129,189.48
  4. Step 4: Simplify right side
    339,549.72x = 65,827,946,603.03
  5. Step 5: Solve for x
    x = 65,827,946,603.03/339,549.72
  6. Step 6: Final answer
    x = 193,868.36

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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.