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Finding the Fourth Proportional to 289,061.60, 433,657.20 and 89,391.20

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Solution

The fourth proportional to 289,061.60, 433,657.20 and 89,391.20 is: 134,106.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,061.60 : 433,657.20 = 89,391.20 : x
  2. Step 2: Convert to fraction form
    289,061.60/433,657.20 = 89,391.20/x
  3. Step 3: Cross multiply
    289,061.60x = 433,657.20 × 89,391.20
  4. Step 4: Simplify right side
    289,061.60x = 38,765,137,496.64
  5. Step 5: Solve for x
    x = 38,765,137,496.64/289,061.60
  6. Step 6: Final answer
    x = 134,106.84

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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.