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Finding the Fourth Proportional to 289,181.70, 433,772.55 and 287,213.40

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Solution

The fourth proportional to 289,181.70, 433,772.55 and 287,213.40 is: 430,820.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,181.70 : 433,772.55 = 287,213.40 : x
  2. Step 2: Convert to fraction form
    289,181.70/433,772.55 = 287,213.40/x
  3. Step 3: Cross multiply
    289,181.70x = 433,772.55 × 287,213.40
  4. Step 4: Simplify right side
    289,181.70x = 124,585,288,912.17
  5. Step 5: Solve for x
    x = 124,585,288,912.17/289,181.70
  6. Step 6: Final answer
    x = 430,820.10

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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.