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Finding the Fourth Proportional to 519,550.39, 778,720.51 and 219,931.39

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Solution

The fourth proportional to 519,550.39, 778,720.51 and 219,931.39 is: 329,640.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,550.39 : 778,720.51 = 219,931.39 : x
  2. Step 2: Convert to fraction form
    519,550.39/778,720.51 = 219,931.39/x
  3. Step 3: Cross multiply
    519,550.39x = 778,720.51 × 219,931.39
  4. Step 4: Simplify right side
    519,550.39x = 171,265,084,185.81
  5. Step 5: Solve for x
    x = 171,265,084,185.81/519,550.39
  6. Step 6: Final answer
    x = 329,640.95

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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.