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Finding the Fourth Proportional to 418,705.56, 577,610.28 and 248,819.40

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Solution

The fourth proportional to 418,705.56, 577,610.28 and 248,819.40 is: 343,249.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,705.56 : 577,610.28 = 248,819.40 : x
  2. Step 2: Convert to fraction form
    418,705.56/577,610.28 = 248,819.40/x
  3. Step 3: Cross multiply
    418,705.56x = 577,610.28 × 248,819.40
  4. Step 4: Simplify right side
    418,705.56x = 143,720,643,303.43
  5. Step 5: Solve for x
    x = 143,720,643,303.43/418,705.56
  6. Step 6: Final answer
    x = 343,249.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.