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Finding the Fourth Proportional to 401,088.80, 601,633.20 and 311,859.20

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Solution

The fourth proportional to 401,088.80, 601,633.20 and 311,859.20 is: 467,788.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,088.80 : 601,633.20 = 311,859.20 : x
  2. Step 2: Convert to fraction form
    401,088.80/601,633.20 = 311,859.20/x
  3. Step 3: Cross multiply
    401,088.80x = 601,633.20 × 311,859.20
  4. Step 4: Simplify right side
    401,088.80x = 187,624,848,445.44
  5. Step 5: Solve for x
    x = 187,624,848,445.44/401,088.80
  6. Step 6: Final answer
    x = 467,788.80

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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.