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Finding the Fourth Proportional to 289,166.40, 405,662.40 and 289,166.40

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Solution

The fourth proportional to 289,166.40, 405,662.40 and 289,166.40 is: 405,662.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,166.40 : 405,662.40 = 289,166.40 : x
  2. Step 2: Convert to fraction form
    289,166.40/405,662.40 = 289,166.40/x
  3. Step 3: Cross multiply
    289,166.40x = 405,662.40 × 289,166.40
  4. Step 4: Simplify right side
    289,166.40x = 117,303,935,823.36
  5. Step 5: Solve for x
    x = 117,303,935,823.36/289,166.40
  6. Step 6: Final answer
    x = 405,662.40

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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.