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Finding the Fourth Proportional to 339,677.76, 509,515.92 and 90,359.76

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Solution

The fourth proportional to 339,677.76, 509,515.92 and 90,359.76 is: 135,539.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,677.76 : 509,515.92 = 90,359.76 : x
  2. Step 2: Convert to fraction form
    339,677.76/509,515.92 = 90,359.76/x
  3. Step 3: Cross multiply
    339,677.76x = 509,515.92 × 90,359.76
  4. Step 4: Simplify right side
    339,677.76x = 46,039,736,247.38
  5. Step 5: Solve for x
    x = 46,039,736,247.38/339,677.76
  6. Step 6: Final answer
    x = 135,539.45

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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.