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Finding the Fourth Proportional to 339,586.28, 509,378.80 and 90,268.28

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Solution

The fourth proportional to 339,586.28, 509,378.80 and 90,268.28 is: 135,402.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,586.28 : 509,378.80 = 90,268.28 : x
  2. Step 2: Convert to fraction form
    339,586.28/509,378.80 = 90,268.28/x
  3. Step 3: Cross multiply
    339,586.28x = 509,378.80 × 90,268.28
  4. Step 4: Simplify right side
    339,586.28x = 45,980,748,144.46
  5. Step 5: Solve for x
    x = 45,980,748,144.46/339,586.28
  6. Step 6: Final answer
    x = 135,402.26

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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.