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Finding the Fourth Proportional to 339,399.41, 509,098.70 and 86,680.11

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Solution

The fourth proportional to 339,399.41, 509,098.70 and 86,680.11 is: 130,020.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,399.41 : 509,098.70 = 86,680.11 : x
  2. Step 2: Convert to fraction form
    339,399.41/509,098.70 = 86,680.11/x
  3. Step 3: Cross multiply
    339,399.41x = 509,098.70 × 86,680.11
  4. Step 4: Simplify right side
    339,399.41x = 44,128,730,883.46
  5. Step 5: Solve for x
    x = 44,128,730,883.46/339,399.41
  6. Step 6: Final answer
    x = 130,020.06

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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.