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Finding the Fourth Proportional to 681,103.80, 1,021,655.70 and 607,620.60

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Solution

The fourth proportional to 681,103.80, 1,021,655.70 and 607,620.60 is: 911,430.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,103.80 : 1,021,655.70 = 607,620.60 : x
  2. Step 2: Convert to fraction form
    681,103.80/1,021,655.70 = 607,620.60/x
  3. Step 3: Cross multiply
    681,103.80x = 1,021,655.70 × 607,620.60
  4. Step 4: Simplify right side
    681,103.80x = 620,779,049,427.42
  5. Step 5: Solve for x
    x = 620,779,049,427.42/681,103.80
  6. Step 6: Final answer
    x = 911,430.90

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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.