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Finding the Fourth Proportional to 289,329.70, 405,994.70 and 289,329.70

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Solution

The fourth proportional to 289,329.70, 405,994.70 and 289,329.70 is: 405,994.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,329.70 : 405,994.70 = 289,329.70 : x
  2. Step 2: Convert to fraction form
    289,329.70/405,994.70 = 289,329.70/x
  3. Step 3: Cross multiply
    289,329.70x = 405,994.70 × 289,329.70
  4. Step 4: Simplify right side
    289,329.70x = 117,466,324,752.59
  5. Step 5: Solve for x
    x = 117,466,324,752.59/289,329.70
  6. Step 6: Final answer
    x = 405,994.70

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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.