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Finding the Fourth Proportional to 385,388.20, 577,995.90 and 253,196.20

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Solution

The fourth proportional to 385,388.20, 577,995.90 and 253,196.20 is: 379,737.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,388.20 : 577,995.90 = 253,196.20 : x
  2. Step 2: Convert to fraction form
    385,388.20/577,995.90 = 253,196.20/x
  3. Step 3: Cross multiply
    385,388.20x = 577,995.90 × 253,196.20
  4. Step 4: Simplify right side
    385,388.20x = 146,346,365,495.58
  5. Step 5: Solve for x
    x = 146,346,365,495.58/385,388.20
  6. Step 6: Final answer
    x = 379,737.54

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1.5x scale

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.