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Finding the Fourth Proportional to 289,344.60, 434,081.70 and 89,674.20

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Solution

The fourth proportional to 289,344.60, 434,081.70 and 89,674.20 is: 134,531.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,344.60 : 434,081.70 = 89,674.20 : x
  2. Step 2: Convert to fraction form
    289,344.60/434,081.70 = 89,674.20/x
  3. Step 3: Cross multiply
    289,344.60x = 434,081.70 × 89,674.20
  4. Step 4: Simplify right side
    289,344.60x = 38,925,929,182.14
  5. Step 5: Solve for x
    x = 38,925,929,182.14/289,344.60
  6. Step 6: Final answer
    x = 134,531.38

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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.