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Finding the Fourth Proportional to 680,801.70, 1,021,202.55 and 207,510.60

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Solution

The fourth proportional to 680,801.70, 1,021,202.55 and 207,510.60 is: 311,265.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,801.70 : 1,021,202.55 = 207,510.60 : x
  2. Step 2: Convert to fraction form
    680,801.70/1,021,202.55 = 207,510.60/x
  3. Step 3: Cross multiply
    680,801.70x = 1,021,202.55 × 207,510.60
  4. Step 4: Simplify right side
    680,801.70x = 211,910,353,872.03
  5. Step 5: Solve for x
    x = 211,910,353,872.03/680,801.70
  6. Step 6: Final answer
    x = 311,265.90

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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.