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Finding the Fourth Proportional to 385,371.20, 577,970.40 and 253,179.20

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Solution

The fourth proportional to 385,371.20, 577,970.40 and 253,179.20 is: 379,712.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,371.20 : 577,970.40 = 253,179.20 : x
  2. Step 2: Convert to fraction form
    385,371.20/577,970.40 = 253,179.20/x
  3. Step 3: Cross multiply
    385,371.20x = 577,970.40 × 253,179.20
  4. Step 4: Simplify right side
    385,371.20x = 146,330,083,495.68
  5. Step 5: Solve for x
    x = 146,330,083,495.68/385,371.20
  6. Step 6: Final answer
    x = 379,712.04

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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.