Home / 1,098,006.40-1,647,009.60-721,307.80

Finding the Fourth Proportional to 1,098,006.40, 1,647,009.60 and 721,307.80

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Solution

The fourth proportional to 1,098,006.40, 1,647,009.60 and 721,307.80 is: 1,081,961.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098,006.40 : 1,647,009.60 = 721,307.80 : x
  2. Step 2: Convert to fraction form
    1,098,006.40/1,647,009.60 = 721,307.80/x
  3. Step 3: Cross multiply
    1,098,006.40x = 1,647,009.60 × 721,307.80
  4. Step 4: Simplify right side
    1,098,006.40x = 1,188,000,871,154.88
  5. Step 5: Solve for x
    x = 1,188,000,871,154.88/1,098,006.40
  6. Step 6: Final answer
    x = 1,081,961.70

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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.