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Finding the Fourth Proportional to 326,813.70, 490,394.70 and 127,140.60

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Solution

The fourth proportional to 326,813.70, 490,394.70 and 127,140.60 is: 190,778.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,813.70 : 490,394.70 = 127,140.60 : x
  2. Step 2: Convert to fraction form
    326,813.70/490,394.70 = 127,140.60/x
  3. Step 3: Cross multiply
    326,813.70x = 490,394.70 × 127,140.60
  4. Step 4: Simplify right side
    326,813.70x = 62,349,076,394.82
  5. Step 5: Solve for x
    x = 62,349,076,394.82/326,813.70
  6. Step 6: Final answer
    x = 190,778.65

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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.