Home / 681,123.60-1,021,685.40-207,808.20

Finding the Fourth Proportional to 681,123.60, 1,021,685.40 and 207,808.20

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Solution

The fourth proportional to 681,123.60, 1,021,685.40 and 207,808.20 is: 311,712.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,123.60 : 1,021,685.40 = 207,808.20 : x
  2. Step 2: Convert to fraction form
    681,123.60/1,021,685.40 = 207,808.20/x
  3. Step 3: Cross multiply
    681,123.60x = 1,021,685.40 × 207,808.20
  4. Step 4: Simplify right side
    681,123.60x = 212,314,603,940.28
  5. Step 5: Solve for x
    x = 212,314,603,940.28/681,123.60
  6. Step 6: Final answer
    x = 311,712.30

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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.