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Finding the Fourth Proportional to 289,211.79, 433,837.89 and 89,505.90

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Solution

The fourth proportional to 289,211.79, 433,837.89 and 89,505.90 is: 134,265.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,211.79 : 433,837.89 = 89,505.90 : x
  2. Step 2: Convert to fraction form
    289,211.79/433,837.89 = 89,505.90/x
  3. Step 3: Cross multiply
    289,211.79x = 433,837.89 × 89,505.90
  4. Step 4: Simplify right side
    289,211.79x = 38,831,050,798.55
  5. Step 5: Solve for x
    x = 38,831,050,798.55/289,211.79
  6. Step 6: Final answer
    x = 134,265.10

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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.