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Finding the Fourth Proportional to 289,937.43, 435,031.29 and 156,911.55

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Solution

The fourth proportional to 289,937.43, 435,031.29 and 156,911.55 is: 235,435.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,937.43 : 435,031.29 = 156,911.55 : x
  2. Step 2: Convert to fraction form
    289,937.43/435,031.29 = 156,911.55/x
  3. Step 3: Cross multiply
    289,937.43x = 435,031.29 × 156,911.55
  4. Step 4: Simplify right side
    289,937.43x = 68,261,434,012.40
  5. Step 5: Solve for x
    x = 68,261,434,012.40/289,937.43
  6. Step 6: Final answer
    x = 235,435.05

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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.