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Finding the Fourth Proportional to 403,708,808.80, 605,563,213.20 and 220,042,799.20

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Solution

The fourth proportional to 403,708,808.80, 605,563,213.20 and 220,042,799.20 is: 330,064,198.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,708,808.80 : 605,563,213.20 = 220,042,799.20 : x
  2. Step 2: Convert to fraction form
    403,708,808.80/605,563,213.20 = 220,042,799.20/x
  3. Step 3: Cross multiply
    403,708,808.80x = 605,563,213.20 × 220,042,799.20
  4. Step 4: Simplify right side
    403,708,808.80x = 133,249,824,525,074,400
  5. Step 5: Solve for x
    x = 133,249,824,525,074,400/403,708,808.80
  6. Step 6: Final answer
    x = 330,064,198.80

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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.