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Finding the Fourth Proportional to 253,359.64, 379,912 and 84,821.32

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Solution

The fourth proportional to 253,359.64, 379,912 and 84,821.32 is: 127,189.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,359.64 : 379,912 = 84,821.32 : x
  2. Step 2: Convert to fraction form
    253,359.64/379,912 = 84,821.32/x
  3. Step 3: Cross multiply
    253,359.64x = 379,912 × 84,821.32
  4. Step 4: Simplify right side
    253,359.64x = 32,224,637,323.84
  5. Step 5: Solve for x
    x = 32,224,637,323.84/253,359.64
  6. Step 6: Final answer
    x = 127,189.31

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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.