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Finding the Fourth Proportional to 257,220.40, 385,600.20 and 168,516.40

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Solution

The fourth proportional to 257,220.40, 385,600.20 and 168,516.40 is: 252,623.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,220.40 : 385,600.20 = 168,516.40 : x
  2. Step 2: Convert to fraction form
    257,220.40/385,600.20 = 168,516.40/x
  3. Step 3: Cross multiply
    257,220.40x = 385,600.20 × 168,516.40
  4. Step 4: Simplify right side
    257,220.40x = 64,979,957,543.28
  5. Step 5: Solve for x
    x = 64,979,957,543.28/257,220.40
  6. Step 6: Final answer
    x = 252,623.65

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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.