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Finding the Fourth Proportional to 519,963.30, 780,054.30 and 295,139.70

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Solution

The fourth proportional to 519,963.30, 780,054.30 and 295,139.70 is: 442,771.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,963.30 : 780,054.30 = 295,139.70 : x
  2. Step 2: Convert to fraction form
    519,963.30/780,054.30 = 295,139.70/x
  3. Step 3: Cross multiply
    519,963.30x = 780,054.30 × 295,139.70
  4. Step 4: Simplify right side
    519,963.30x = 230,224,992,085.71
  5. Step 5: Solve for x
    x = 230,224,992,085.71/519,963.30
  6. Step 6: Final answer
    x = 442,771.62

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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.