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Finding the Fourth Proportional to 339,352.81, 509,094.80 and 128,974.35

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Solution

The fourth proportional to 339,352.81, 509,094.80 and 128,974.35 is: 193,486.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,352.81 : 509,094.80 = 128,974.35 : x
  2. Step 2: Convert to fraction form
    339,352.81/509,094.80 = 128,974.35/x
  3. Step 3: Cross multiply
    339,352.81x = 509,094.80 × 128,974.35
  4. Step 4: Simplify right side
    339,352.81x = 65,660,170,918.38
  5. Step 5: Solve for x
    x = 65,660,170,918.38/339,352.81
  6. Step 6: Final answer
    x = 193,486.45

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Double scale
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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.