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Finding the Fourth Proportional to 253,788.80, 380,653.48 and 101,979.76

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Solution

The fourth proportional to 253,788.80, 380,653.48 and 101,979.76 is: 152,957.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,788.80 : 380,653.48 = 101,979.76 : x
  2. Step 2: Convert to fraction form
    253,788.80/380,653.48 = 101,979.76/x
  3. Step 3: Cross multiply
    253,788.80x = 380,653.48 × 101,979.76
  4. Step 4: Simplify right side
    253,788.80x = 38,818,950,533.56
  5. Step 5: Solve for x
    x = 38,818,950,533.56/253,788.80
  6. Step 6: Final answer
    x = 152,957.70

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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.