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Finding the Fourth Proportional to 339,281.60, 509,116.80 and 129,070.40

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Solution

The fourth proportional to 339,281.60, 509,116.80 and 129,070.40 is: 193,679.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,281.60 : 509,116.80 = 129,070.40 : x
  2. Step 2: Convert to fraction form
    339,281.60/509,116.80 = 129,070.40/x
  3. Step 3: Cross multiply
    339,281.60x = 509,116.80 × 129,070.40
  4. Step 4: Simplify right side
    339,281.60x = 65,711,909,022.72
  5. Step 5: Solve for x
    x = 65,711,909,022.72/339,281.60
  6. Step 6: Final answer
    x = 193,679.55

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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.