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Finding the Fourth Proportional to 634,189.21, 875,221.64 and 418,951.96

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Solution

The fourth proportional to 634,189.21, 875,221.64 and 418,951.96 is: 578,180.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,189.21 : 875,221.64 = 418,951.96 : x
  2. Step 2: Convert to fraction form
    634,189.21/875,221.64 = 418,951.96/x
  3. Step 3: Cross multiply
    634,189.21x = 875,221.64 × 418,951.96
  4. Step 4: Simplify right side
    634,189.21x = 366,675,818,800.67
  5. Step 5: Solve for x
    x = 366,675,818,800.67/634,189.21
  6. Step 6: Final answer
    x = 578,180.48

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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.