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Finding the Fourth Proportional to 339,355.19, 509,098.37 and 128,976.72

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Solution

The fourth proportional to 339,355.19, 509,098.37 and 128,976.72 is: 193,490.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,355.19 : 509,098.37 = 128,976.72 : x
  2. Step 2: Convert to fraction form
    339,355.19/509,098.37 = 128,976.72/x
  3. Step 3: Cross multiply
    339,355.19x = 509,098.37 × 128,976.72
  4. Step 4: Simplify right side
    339,355.19x = 65,661,837,275.06
  5. Step 5: Solve for x
    x = 65,661,837,275.06/339,355.19
  6. Step 6: Final answer
    x = 193,490.01

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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.