Home / 279,938,721.40-419,908,082.10-172,293,998.20

Finding the Fourth Proportional to 279,938,721.40, 419,908,082.10 and 172,293,998.20

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Solution

The fourth proportional to 279,938,721.40, 419,908,082.10 and 172,293,998.20 is: 258,440,997.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,938,721.40 : 419,908,082.10 = 172,293,998.20 : x
  2. Step 2: Convert to fraction form
    279,938,721.40/419,908,082.10 = 172,293,998.20/x
  3. Step 3: Cross multiply
    279,938,721.40x = 419,908,082.10 × 172,293,998.20
  4. Step 4: Simplify right side
    279,938,721.40x = 72,347,642,341,502,848
  5. Step 5: Solve for x
    x = 72,347,642,341,502,848/279,938,721.40
  6. Step 6: Final answer
    x = 258,440,997.30

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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.