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Finding the Fourth Proportional to 315,477.55, 435,408.99 and 200,636.46

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Solution

The fourth proportional to 315,477.55, 435,408.99 and 200,636.46 is: 276,910.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,477.55 : 435,408.99 = 200,636.46 : x
  2. Step 2: Convert to fraction form
    315,477.55/435,408.99 = 200,636.46/x
  3. Step 3: Cross multiply
    315,477.55x = 435,408.99 × 200,636.46
  4. Step 4: Simplify right side
    315,477.55x = 87,358,918,405.78
  5. Step 5: Solve for x
    x = 87,358,918,405.78/315,477.55
  6. Step 6: Final answer
    x = 276,910.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.