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Finding the Fourth Proportional to 605,780.70, 908,671.05 and 206,871.90

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Solution

The fourth proportional to 605,780.70, 908,671.05 and 206,871.90 is: 310,307.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,780.70 : 908,671.05 = 206,871.90 : x
  2. Step 2: Convert to fraction form
    605,780.70/908,671.05 = 206,871.90/x
  3. Step 3: Cross multiply
    605,780.70x = 908,671.05 × 206,871.90
  4. Step 4: Simplify right side
    605,780.70x = 187,978,506,588.50
  5. Step 5: Solve for x
    x = 187,978,506,588.50/605,780.70
  6. Step 6: Final answer
    x = 310,307.85

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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.