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Finding the Fourth Proportional to 486,624.58, 671,561.10 and 279,892.63

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Solution

The fourth proportional to 486,624.58, 671,561.10 and 279,892.63 is: 386,262.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,624.58 : 671,561.10 = 279,892.63 : x
  2. Step 2: Convert to fraction form
    486,624.58/671,561.10 = 279,892.63/x
  3. Step 3: Cross multiply
    486,624.58x = 671,561.10 × 279,892.63
  4. Step 4: Simplify right side
    486,624.58x = 187,965,002,484.69
  5. Step 5: Solve for x
    x = 187,965,002,484.69/486,624.58
  6. Step 6: Final answer
    x = 386,262.86

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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.