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Finding the Fourth Proportional to 326,802.70, 490,378.20 and 127,129.60

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Solution

The fourth proportional to 326,802.70, 490,378.20 and 127,129.60 is: 190,762.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,802.70 : 490,378.20 = 127,129.60 : x
  2. Step 2: Convert to fraction form
    326,802.70/490,378.20 = 127,129.60/x
  3. Step 3: Cross multiply
    326,802.70x = 490,378.20 × 127,129.60
  4. Step 4: Simplify right side
    326,802.70x = 62,341,584,414.72
  5. Step 5: Solve for x
    x = 62,341,584,414.72/326,802.70
  6. Step 6: Final answer
    x = 190,762.15

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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.