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Finding the Fourth Proportional to 855,812.70, 1,284,640.65 and 482,564.70

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Solution

The fourth proportional to 855,812.70, 1,284,640.65 and 482,564.70 is: 724,366.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,812.70 : 1,284,640.65 = 482,564.70 : x
  2. Step 2: Convert to fraction form
    855,812.70/1,284,640.65 = 482,564.70/x
  3. Step 3: Cross multiply
    855,812.70x = 1,284,640.65 × 482,564.70
  4. Step 4: Simplify right side
    855,812.70x = 619,922,229,875.06
  5. Step 5: Solve for x
    x = 619,922,229,875.06/855,812.70
  6. Step 6: Final answer
    x = 724,366.71

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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.