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Finding the Fourth Proportional to 478,834.40, 660,770.98 and 261,037.89

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Solution

The fourth proportional to 478,834.40, 660,770.98 and 261,037.89 is: 360,221.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,834.40 : 660,770.98 = 261,037.89 : x
  2. Step 2: Convert to fraction form
    478,834.40/660,770.98 = 261,037.89/x
  3. Step 3: Cross multiply
    478,834.40x = 660,770.98 × 261,037.89
  4. Step 4: Simplify right side
    478,834.40x = 172,486,261,739.84
  5. Step 5: Solve for x
    x = 172,486,261,739.84/478,834.40
  6. Step 6: Final answer
    x = 360,221.11

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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.