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Finding the Fourth Proportional to 289,609.28, 434,373.60 and 79,265.60

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Solution

The fourth proportional to 289,609.28, 434,373.60 and 79,265.60 is: 118,887.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,609.28 : 434,373.60 = 79,265.60 : x
  2. Step 2: Convert to fraction form
    289,609.28/434,373.60 = 79,265.60/x
  3. Step 3: Cross multiply
    289,609.28x = 434,373.60 × 79,265.60
  4. Step 4: Simplify right side
    289,609.28x = 34,430,884,028.16
  5. Step 5: Solve for x
    x = 34,430,884,028.16/289,609.28
  6. Step 6: Final answer
    x = 118,887.36

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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.