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Finding the Fourth Proportional to 404,211.40, 606,317.10 and 137,980.60

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Solution

The fourth proportional to 404,211.40, 606,317.10 and 137,980.60 is: 206,970.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,211.40 : 606,317.10 = 137,980.60 : x
  2. Step 2: Convert to fraction form
    404,211.40/606,317.10 = 137,980.60/x
  3. Step 3: Cross multiply
    404,211.40x = 606,317.10 × 137,980.60
  4. Step 4: Simplify right side
    404,211.40x = 83,659,997,248.26
  5. Step 5: Solve for x
    x = 83,659,997,248.26/404,211.40
  6. Step 6: Final answer
    x = 206,970.90

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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.