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Finding the Fourth Proportional to 579,745.70, 809,985.10 and 579,745.70

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Solution

The fourth proportional to 579,745.70, 809,985.10 and 579,745.70 is: 809,985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,745.70 : 809,985.10 = 579,745.70 : x
  2. Step 2: Convert to fraction form
    579,745.70/809,985.10 = 579,745.70/x
  3. Step 3: Cross multiply
    579,745.70x = 809,985.10 × 579,745.70
  4. Step 4: Simplify right side
    579,745.70x = 469,585,378,789.07
  5. Step 5: Solve for x
    x = 469,585,378,789.07/579,745.70
  6. Step 6: Final answer
    x = 809,985.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.