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Finding the Fourth Proportional to 289,789.44, 434,637.51 and 79,378.20

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Solution

The fourth proportional to 289,789.44, 434,637.51 and 79,378.20 is: 119,054.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,789.44 : 434,637.51 = 79,378.20 : x
  2. Step 2: Convert to fraction form
    289,789.44/434,637.51 = 79,378.20/x
  3. Step 3: Cross multiply
    289,789.44x = 434,637.51 × 79,378.20
  4. Step 4: Simplify right side
    289,789.44x = 34,500,743,196.28
  5. Step 5: Solve for x
    x = 34,500,743,196.28/289,789.44
  6. Step 6: Final answer
    x = 119,054.52

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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.