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Finding the Fourth Proportional to 289,571.60, 434,357.40 and 89,890.40

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Solution

The fourth proportional to 289,571.60, 434,357.40 and 89,890.40 is: 134,835.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,571.60 : 434,357.40 = 89,890.40 : x
  2. Step 2: Convert to fraction form
    289,571.60/434,357.40 = 89,890.40/x
  3. Step 3: Cross multiply
    289,571.60x = 434,357.40 × 89,890.40
  4. Step 4: Simplify right side
    289,571.60x = 39,044,560,428.96
  5. Step 5: Solve for x
    x = 39,044,560,428.96/289,571.60
  6. Step 6: Final answer
    x = 134,835.60

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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.