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Finding the Fourth Proportional to 339,741.60, 509,612.40 and 87,021.60

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Solution

The fourth proportional to 339,741.60, 509,612.40 and 87,021.60 is: 130,532.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,741.60 : 509,612.40 = 87,021.60 : x
  2. Step 2: Convert to fraction form
    339,741.60/509,612.40 = 87,021.60/x
  3. Step 3: Cross multiply
    339,741.60x = 509,612.40 × 87,021.60
  4. Step 4: Simplify right side
    339,741.60x = 44,347,286,427.84
  5. Step 5: Solve for x
    x = 44,347,286,427.84/339,741.60
  6. Step 6: Final answer
    x = 130,532.40

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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.