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Finding the Fourth Proportional to 401,131.80, 601,551.90 and 201,385.80

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Solution

The fourth proportional to 401,131.80, 601,551.90 and 201,385.80 is: 302,005.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,131.80 : 601,551.90 = 201,385.80 : x
  2. Step 2: Convert to fraction form
    401,131.80/601,551.90 = 201,385.80/x
  3. Step 3: Cross multiply
    401,131.80x = 601,551.90 × 201,385.80
  4. Step 4: Simplify right side
    401,131.80x = 121,144,010,623.02
  5. Step 5: Solve for x
    x = 121,144,010,623.02/401,131.80
  6. Step 6: Final answer
    x = 302,005.50

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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.