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Finding the Fourth Proportional to 918,610, 1,377,729.88 and 576,900.80

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Solution

The fourth proportional to 918,610, 1,377,729.88 and 576,900.80 is: 865,234.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,610 : 1,377,729.88 = 576,900.80 : x
  2. Step 2: Convert to fraction form
    918,610/1,377,729.88 = 576,900.80/x
  3. Step 3: Cross multiply
    918,610x = 1,377,729.88 × 576,900.80
  4. Step 4: Simplify right side
    918,610x = 794,813,469,955.90
  5. Step 5: Solve for x
    x = 794,813,469,955.90/918,610
  6. Step 6: Final answer
    x = 865,234.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.