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Finding the Fourth Proportional to 279,071,477.88, 418,611,656.02 and 155,360,420.47

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Solution

The fourth proportional to 279,071,477.88, 418,611,656.02 and 155,360,420.47 is: 233,043,102.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,071,477.88 : 418,611,656.02 = 155,360,420.47 : x
  2. Step 2: Convert to fraction form
    279,071,477.88/418,611,656.02 = 155,360,420.47/x
  3. Step 3: Cross multiply
    279,071,477.88x = 418,611,656.02 × 155,360,420.47
  4. Step 4: Simplify right side
    279,071,477.88x = 65,035,682,892,910,200
  5. Step 5: Solve for x
    x = 65,035,682,892,910,200/279,071,477.88
  6. Step 6: Final answer
    x = 233,043,102.03

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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.