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Finding the Fourth Proportional to 519,955.20, 779,276.70 and 253,141.20

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Solution

The fourth proportional to 519,955.20, 779,276.70 and 253,141.20 is: 379,392.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,955.20 : 779,276.70 = 253,141.20 : x
  2. Step 2: Convert to fraction form
    519,955.20/779,276.70 = 253,141.20/x
  3. Step 3: Cross multiply
    519,955.20x = 779,276.70 × 253,141.20
  4. Step 4: Simplify right side
    519,955.20x = 197,267,038,970.04
  5. Step 5: Solve for x
    x = 197,267,038,970.04/519,955.20
  6. Step 6: Final answer
    x = 379,392.38

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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.