Home / 782,118.40-1,172,011.20-663,145.60

Finding the Fourth Proportional to 782,118.40, 1,172,011.20 and 663,145.60

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Solution

The fourth proportional to 782,118.40, 1,172,011.20 and 663,145.60 is: 993,729.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,118.40 : 1,172,011.20 = 663,145.60 : x
  2. Step 2: Convert to fraction form
    782,118.40/1,172,011.20 = 663,145.60/x
  3. Step 3: Cross multiply
    782,118.40x = 1,172,011.20 × 663,145.60
  4. Step 4: Simplify right side
    782,118.40x = 777,214,070,430.72
  5. Step 5: Solve for x
    x = 777,214,070,430.72/782,118.40
  6. Step 6: Final answer
    x = 993,729.43

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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.