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Finding the Fourth Proportional to 470,922.70, 706,384.05 and 155,338.60

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Solution

The fourth proportional to 470,922.70, 706,384.05 and 155,338.60 is: 233,007.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,922.70 : 706,384.05 = 155,338.60 : x
  2. Step 2: Convert to fraction form
    470,922.70/706,384.05 = 155,338.60/x
  3. Step 3: Cross multiply
    470,922.70x = 706,384.05 × 155,338.60
  4. Step 4: Simplify right side
    470,922.70x = 109,728,709,389.33
  5. Step 5: Solve for x
    x = 109,728,709,389.33/470,922.70
  6. Step 6: Final answer
    x = 233,007.90

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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.