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Finding the Fourth Proportional to 289,708.80, 434,595.60 and 90,027.60

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Solution

The fourth proportional to 289,708.80, 434,595.60 and 90,027.60 is: 135,051.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,708.80 : 434,595.60 = 90,027.60 : x
  2. Step 2: Convert to fraction form
    289,708.80/434,595.60 = 90,027.60/x
  3. Step 3: Cross multiply
    289,708.80x = 434,595.60 × 90,027.60
  4. Step 4: Simplify right side
    289,708.80x = 39,125,598,838.56
  5. Step 5: Solve for x
    x = 39,125,598,838.56/289,708.80
  6. Step 6: Final answer
    x = 135,051.47

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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.