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Finding the Fourth Proportional to 279,937,009.10, 391,004,820.10 and 279,937,009.10

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Solution

The fourth proportional to 279,937,009.10, 391,004,820.10 and 279,937,009.10 is: 391,004,820.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,937,009.10 : 391,004,820.10 = 279,937,009.10 : x
  2. Step 2: Convert to fraction form
    279,937,009.10/391,004,820.10 = 279,937,009.10/x
  3. Step 3: Cross multiply
    279,937,009.10x = 391,004,820.10 × 279,937,009.10
  4. Step 4: Simplify right side
    279,937,009.10x = 109,456,719,882,477,584
  5. Step 5: Solve for x
    x = 109,456,719,882,477,584/279,937,009.10
  6. Step 6: Final answer
    x = 391,004,820.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.