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Finding the Fourth Proportional to 253,445.32, 379,964.99 and 127,020.66

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Solution

The fourth proportional to 253,445.32, 379,964.99 and 127,020.66 is: 190,429.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,445.32 : 379,964.99 = 127,020.66 : x
  2. Step 2: Convert to fraction form
    253,445.32/379,964.99 = 127,020.66/x
  3. Step 3: Cross multiply
    253,445.32x = 379,964.99 × 127,020.66
  4. Step 4: Simplify right side
    253,445.32x = 48,263,405,549.11
  5. Step 5: Solve for x
    x = 48,263,405,549.11/253,445.32
  6. Step 6: Final answer
    x = 190,429.27

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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.