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Finding the Fourth Proportional to 289,057.60, 433,651.20 and 89,387.20

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Solution

The fourth proportional to 289,057.60, 433,651.20 and 89,387.20 is: 134,100.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,057.60 : 433,651.20 = 89,387.20 : x
  2. Step 2: Convert to fraction form
    289,057.60/433,651.20 = 89,387.20/x
  3. Step 3: Cross multiply
    289,057.60x = 433,651.20 × 89,387.20
  4. Step 4: Simplify right side
    289,057.60x = 38,762,866,544.64
  5. Step 5: Solve for x
    x = 38,762,866,544.64/289,057.60
  6. Step 6: Final answer
    x = 134,100.84

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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.