Home / 289,271.20-434,198.40-139,631.80

Finding the Fourth Proportional to 289,271.20, 434,198.40 and 139,631.80

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Solution

The fourth proportional to 289,271.20, 434,198.40 and 139,631.80 is: 209,588.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,271.20 : 434,198.40 = 139,631.80 : x
  2. Step 2: Convert to fraction form
    289,271.20/434,198.40 = 139,631.80/x
  3. Step 3: Cross multiply
    289,271.20x = 434,198.40 × 139,631.80
  4. Step 4: Simplify right side
    289,271.20x = 60,627,904,149.12
  5. Step 5: Solve for x
    x = 60,627,904,149.12/289,271.20
  6. Step 6: Final answer
    x = 209,588.46

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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.