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Finding the Fourth Proportional to 311,885.71, 430,401 and 168,645.72

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Solution

The fourth proportional to 311,885.71, 430,401 and 168,645.72 is: 232,730.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,885.71 : 430,401 = 168,645.72 : x
  2. Step 2: Convert to fraction form
    311,885.71/430,401 = 168,645.72/x
  3. Step 3: Cross multiply
    311,885.71x = 430,401 × 168,645.72
  4. Step 4: Simplify right side
    311,885.71x = 72,585,286,533.72
  5. Step 5: Solve for x
    x = 72,585,286,533.72/311,885.71
  6. Step 6: Final answer
    x = 232,730.40

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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.